46P/Wirtanen

46P/Wirtanen – COPH/LIADA Comet Observation Database – Lightcurve: Magnitude visual vs Days from T. – 2019 March 3 – Pre-perihelion Ho=8.7 / n=10.0 / Post-Perihelion Ho=9.0 / n= 6.8

Helio Magnitude versus R

46P/Wirtanen
Reported observations:
2019 Mar. 10.74 UT: m1=11,0 Dia.=3', DC=2/, ... 25-cm L(70x,150x) ... Danil Sidorko (Korenovsk, Russia)
2019 Mar. 09.90 UT: m1=10.6, Dia.=4', DC=2, ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Trichero, Leon, Spain. 42º 46′ N, 5º 53′ W, alt. 1190 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5]
2019 Mar. 06.81 UT: m1=14.6 CCD, Dia.=0.48', DC=6/, ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Belarus)
2019 Mar. 02.73 UT: m1=11.1, Dia.=3', DC=1/, ... 25.4-cm L(120x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.60]
2019 Feb. 27.79 UT: m1=10.3, Dia.=4 2', DC=2, ... 25.4-cm L f:5(64x) ... Maik Meyer (Linter, Germany)
2019 Feb. 26.80 UT: m1=10.3:, Dia.=4', DC=2, ... 25.4-cm L f:5(64x) ... Maik Meyer (Linter, Germany)
2019 Feb. 25.78 UT: m1=10.1, Dia.=3.5', DC=2/, ... 25.4-cm L f:5(64x) ... Maik Meyer (Linter, Germany) [11.4-mag star in coma]
2019 Feb. 24.85 UT: m1=8.8, Dia.=8', DC=2, ... 25x100 B ... Juan Jose Gonzalez (In 20 cm SCT (77x) : m1=10.3, Dia.=5', DC=2/. Puerto de Aralla, Leon, Spain. 42º 54' N, 5º 48' W, alt. 1530 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2019 Feb. 24.85 UT: m1=10.3, Dia.=5', DC=2/, ... 20-cm SCT(77x) ... Juan Jose Gonzalez Puerto de Aralla, Leon, Spain)
2019 Feb. 24.78 UT: m1=9.9, Dia.=3.7', DC=2, ... 25.0-cm L(64x) ... Maik Meyer (Linter, Germany)
2019 Feb. 23.86 UT: m1=9.7, Dia.=6', DC=3, ... 20-cm T(80x) ... Carlos Labordena (Castellón, España)
2019 Feb. 23.79 UT: m1=9.4, Dia.=7', DC=2/, ... 25.0-cm L(64x) ... Maik Meyer (Linter, Germany)
2019 Feb. 23.78 UT: m1=9.2, Dia.=8', DC=2, ... 12.0-cm R(30x) ... Maik Meyer (Linter, Germany)
2019 Feb. 23.49 UT: m1=10.2, Dia.=4.3', DC=1, ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Ibaraki, Japan)
2019 Feb. 22.83 UT: m1=8.9, Dia.=10', DC=2, ... 12.0-cm R(30x) ... Maik Meyer (Linter, Germany)
2019 Feb. 22.77 UT: m1=12.6 CCD, Dia.=0.55', DC=6/, ... 0.25-m f/4.7 Newton + CCD ... Sergey Shurpakov (Observatory C36, Belarus)
2019 Feb. 16.19 UT: m1=8.8, Dia.=10', DC=2/, ... 12.0-cm R f:5(30x) ...  Maik Meyer (Linter, Germany)
2019 Feb. 15.15 TU m1=8.8, Dia.=9', DC=2, ... 12.0-cm R f:5(30x) ... Maik Meyer (Linter, Germany)
2019 Feb. 13.17 UT: m1=7.7, Dia.=18', DC=2, ... 12x45 monocular ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain. 42º 54' N, 5º 48' W, alt. 1530 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.5. 21.6 at zenit]  
2019 Feb. 11.97 UT: m1=8.7, Dia.=11', DC=2, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2019 Feb. 10.68 UT: m1=9.5, Dia.=3', DC=1/, ... 25.4-cm L(120x) ...Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=5.29]
2019 Feb. 08.94 UT: m1=8.2, Dia.=15', DC=3, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2019 Feb. 08.93 UT: m1=8.3, Dia.=12', DC=2, ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2019 Feb. 07.84 UT: m1=8.5, Dia.=10', DC=2/, ... 12-cm R f:5(30x) ... Maik Meyer (Linter, Germany)
2019 Feb. 06.15 UT: m1=8.5, Dia.=8', DC=2/, ... 12-cm R f:5(30xx) ... Maik Meyer (Linter, Germany)
2019 Feb. 06.01 UT: m1=6.7, Dia.=25', DC=2, ... 12x45 monocular ... Juan Jose Gonzalez (Collada de la Cobertoria, Asturias, Spain. 43º 9' N, 5º 54' W, alt. 1179 m) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.3; 21.5 at zenit]
2019 Feb. 05.90 UT: m1=7.3, Dia.=25', DC=3, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2019 Feb. 05.89 UT: m1=7.8, Dia.=20', DC=2, ... 20-cm T(50x) ... Carlos Labordena (Castellón, España)
2019 Feb. 04.16 UT: m1=8.1, Dia.=11’, DC=3, ... 12.0-cm R f:5(30x) ... Maik Meyer (Linter, Germany) 
2019 Feb. 03.92 UT: m1=8.8, Dia.=6', DC=2, ... 20X80 B ... Valentín Díaz (Cancárix, Albacete, España)
2019 Feb. 03.00 UT: m1=6.5, Dia.=30', DC=2, ... 12x45 monocular ... Juan Jose Gonzalez (Matadeon de los Oteros, Leon, Spain. Alt. 870 m, 42º 20' N, 5º 23' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.4]
2019 Jan. 30.21 UT: m1=7.0, Dia.=15’, DC=3, ... 10x50 B ... Martin Lehky (Czech Republic)
2019 Jan. 29.86 UT: m1=7.7, Dia.=23', DC=2, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2019 Jan. 26.92 UT: m1=7.6, Dia.=20', DC=2, ... 10X50 B ... Valentín Díaz (La Romaneta, Alicante, España)
2019 Jan. 26.91 UT: m1=7.3, Dia.=22', DC=2, ... 12.7-cm L(25X) ... Valentín Díaz (La Romaneta, Alicante, España)
2019 Jan. 25.89 UT: m1=7.6, Dia.=20', DC=2, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2019 Jan. 25.84 UT: m1=6.2, Dia.=35', DC=3, ... 12x45 monocular ... Juan Jose Gonzalez (Villacintor, Leon, Spain. Alt. 930 m, 42º 29' N, 5º 11' W) [Mag. 5.3 (TK) star in coma. Sidgwick method. Tycho-2 comparison stars. SQM: 21.3]
2019 Jan. 24.72 UT: m1=7.6, Dia.=8', DC=3/, ... 25.4-cm L (48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.19]
2019 Jan. 21.19 UT: m1=6.9, Dia.=25', DC=2/, ... 5.0-cm B(10x) ... Maik Meyer (Linter, Germany) [all obs during total lunar eclipse]
2019 Jan. 18.75 UT: m1=6.9, Dia.=15’, DC=2/, ... 10x50 B ... Martin Lehky (Czech Republic)
2019 Jan. 14.75 UT: m1=6.7, Dia.=20’, DC=2/, ... 10x50 B ... Martin Lehky (Czech Republic)
2019 Jan. 14.10 UT: m1=5.6, Dia.=45', DC=3/, ... 12x45 monocular ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Several stars inside the coma, the brightest being mag. 7.0. Sidgwick method. Tycho-2 comparison stars. SQM : 21.5.].
2019 Jan. 12.99 UT: m1=6.8, Dia.=26', DC=3, ... 10x50 B ... Valentín Díaz (La Romaneta, Alicante, España)
2019 Jan. 11.93 UT: m1=6.2, Dia.=25', DC=2, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2019 Jan. 08.67 UT: m1=6.4, Dia.=18', DC=3/, ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.06]
2019 Jan. 07.16 UT: m1=5.4, Dia.=40', DC=3/, ... 12x45 monocular ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.6]
2019 Jan. 06.85 UT: m1=5.5, Dia.=35', DC=3/, ... 12x45 monocular ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 21.1; 21.2 at zenith]
2019 Jan. 06.82 UT: m1=5.5, Dia.=26', DC=2, ... 10x70R ... Seiichi Yoshida (Ibaraki, Japan)
2019 Jan. 04.167 UT: m1=5.2, Dia.=28', DC=1, ... 10x70 B ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 6.0. Sidgwick method. Tycho-2 comparison stars. Altura: 40°]
2019 Jan. 03.19 UT: m1=5.5, Dia.=35', DC=2, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2019 Jan. 01.89 UT: m1=5.4, Dia.=35', DC=2, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2019 Jan. 01.80 UT: m1=5.0, Dia.=40', DC=4, ... Naked Eye ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [In 12x45 monocular: m1=5.2, Dia.=45', DC=3/; several stars inside the coma, the brightest being mag. 7.9 (TK). Sidgwick method. Tycho-2 comparison stars. SQM: 21.2]
2019 Jan. 01.76 UT: m1=5.5, Dia.=30’, DC=2/, ... Naked Eye ... Martin Lehky (Czech Republic)
2019 Jan. 01.75 UT: m1=5.9, Dia.=20’, DC=2/, ... 10x50 B ... Martin Lehky (Czech Republic)
2018 Dec. 31.72 UT: m1=5.4, Dia.=35’, DC=3, ... Naked Eye ... Martin Lehky (Czech Republic)
2018 Dec. 31.61 UT: m1=5.0, Dia.=40', DC=2, ... Naked Eye ... Seiichi Yoshida (Ibaraki, Japan)
2018 Dec. 31.61 UT: m1=5.6, Dia.=40', DC=3/, ... 10x70R ... Seiichi Yoshida (Ibaraki, Japan)
2018 Dec. 30.90 UT: m1=5.6, Dia.=37', DC=4, ... 5x25 B ... Valentín Díaz (Cancárix, Albacete, España)
2018 Dec. 31.71 UT: m1=5.7, Dia.=25’, DC=3, ... 10x50 B ... Martin Lehky (Czech Republic)
2018 Dec. 30.71 UT: m1=5.4, Dia.=30’, DC=2/, ... Naked Eye ... Martin Lehky (Czech Republic)
2018 Dec. 30.70 UT: m1=5.8, Dia.=20’, DC=2/, ... 10x50 B ... Martin Lehky (Czech Republic)
2018 Dec. 29.87 UT: m1=5.4, Dia.=40', DC=4, ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Dec. 29.86 UT: m1=5.2, Dia.=40', DC=3, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Dec. 29.82 UT: m1=5.1, Dia.=45', DC=3/, ... 12x45 monocular ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [In 12x45 monocular: several stars inside the coma, the brightest being mag. 7.4 (TK). Comet visible to naked eye, magnitude difficult to estimate due to nearby field stars. Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 27.094 UT: m1=4.6, Dia.=22′, DC=3, ... 20x80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela, 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 4.0. Sidgwick method. Tycho-2 comparison stars. Altura: 37°. Pollution. Urban Sky]
2018 Dec. 26.063 UT: m1=4.4, Dia.=20′, DC=3, ... 20x80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela, 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 3.8. Sidgwick method. Tycho-2 comparison stars. Altura: 32°. Pollution. Urban Sky]
2018 Dec. 23.99 UT: m1=4.2, Dia.=23', DC=3, ... 20x80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela. 10°4' N, 69° 21' W, Alt. 606m) [MALE: 4.0. Sidgwick method. Tycho-2 comparison stars. Altura: 28°. Pollution. Urban Sky]
2018 Dec. 21.08 UT: m1=4.4:, Dia.=40', DC=3, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Dec. 20.08 UT: m1=4.2, Dia.= 45', DC=3/,... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Dec. 19.12 UT: m1= 4.1:, Dia.=50', DC=3/, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Dec. 18.12 UT: m1=3.8:, Dia.=70', DC=3/, .. Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [moonlight, averted vision] 
2018 Dec. 18.08 UT: m1=3.9:, Dia.=60', DC=4/, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Moonlight]
2018 Dec. 17.41 UT: m1=5.0, Dia.=40', DC=3, ... 10x66R (10x) ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 17.271 UT: m1=3.7, Dia.=80′, DC=3, ... 20x80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela, 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 3.95. Sidgwick method. Tycho-2 comparison stars. Altura: 39°. Pollution. Urban Sky]
2018 Dec. 16.29 UT: m1=3.8, Dia.=80', DC=3, ... Naked Eye ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 16.29 UT: m1=4.7, Dia.=50', DC=4, ... 10x66R (10x) ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 16.19 UT: m1=3.6, Dia.=>90', DC=3/, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) 
2018 Dec. 16.18 UT: m1=3.9, Dia.=70', DC=5, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 16.09 UT: m1=3.8, Dia.=50', DC=4, ... 10x70 B ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 16.06 UT: m1=4.1, Dia.=60', DC=4, ... 10x42 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 15.44 UT: m1=3.6, Dia.=115', DC=3, ... Naked Eye ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 15.44 UT: m1=4.7, Dia.=55', DC=5, ... 10x66R (10x) ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 15.13 UT: m1=3.7, Dia.=>90', DC=3/, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 15.12 UT: m1=4.0, Dia.=70', DC=5, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 15.104 UT: m1=3.7, Dia.=33′, DC=2, ... 20x80 B ... Roger Jimenez (Barquisimeto, Lara, Venezuela, 10°4′ N, 69° 21′ W, Alt. 606m) [MALE: 3.9. Sidgwick method. Tycho-2 comparison stars. Altura: 84°. Pollution. Urban Sky. Moonlight 45%]
2018 Dec. 14.99 UT: m1=4.6, Dia.=30', DC=2, ... 10-cm R f/5(20x) ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 14.98 UT: m1=4.6, Dia.=30', DC=3, ... 15x70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 14.97 UT: m1=4.0, Dia.=75', DC=3, ... 3.3-cm R(5x) ... Carlos Labordena (Castellón, España)
2018 Dec. 14.97 UT: m1=4.5, Dia.=30', DC=3, ... 10x42 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 14.62 UT: m1=4.3, Dia=76.5’, DC=5/, ... 1.6x28 R ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude estimate made using 50mm f/1.8 camera lens as an objective and 32mm Plossl eyepiece, hand-held, giving a magnification of x1.6 (Aperture rounded to 28.0mm). Coma well condensed, appears stellar sometimes. Easily visible naked eye. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 14.42 UT: m1=3.4, Dia.=95', DC=4, ... Naked Eye ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 14.42 UT: m1=4.7, Dia.=60', DC=5, ... 10x66R (10x) ... Seiichi Yoshida (Kapalua, Maui, Hawaii)
2018 Dec. 14.13 UT: m1=3.7, Dia.=>90', DC=3/, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 14.12 UT: m1=4.0, Dia.=70', DC=5, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 14.00 UT: m1=4.1, Dia.=75', DC=4, ... Naked Eye ... Juan Jose Gonzalez (Alto del Trichero - Soto y Amio, Leon, Spain. Alt. 1190 m, 42º 46' N, 5º 53' W) [In 12x45 monocular: m1=4.2, Dia.=65', DC=4. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Dec. 13.98 UT: m1=4.6, Dia.=30', DC=3, ... 15x70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 13.83 UT: m1=4.5, Dia.=45', DC=5, ...15x70 B ... Danil Sidorko (Korenovsk, Russia) [very good visible with the naked eye]
2018 Dec. 13.21 UT: m1=3.9, Dia.=70', DC=3, ... Naked Eye ... Seiichi Yoshida (Mauna Kea, Hawaii)
2018 Dec. 13.21 UT: m1=4.8, Dia.=50', DC=4, ... 10x66R (10x) ... Seiichi Yoshida (Mauna Kea, Hawaii)
2018 Dec. 13.10 UT: m1=3.7:, Dia.=>90', DC=3/, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) 
2018 Dec. 13.09 UT: m1=4.0:, Dia.=70', DC=5, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 13.09 UT: m1=4.2, Dia.=15’, DC=3, ... 15x70 B ... Mariano Ribas (Buenos Aires, Argentina) [El cometa es imposible de ver a simple vista en cielo urbano, aunque es más fácil de detectar ¨que hace una semana con los mismos binoculares 15x70)
2018 Dec. 13.041 UT: m1=3.7, Dia.=55′, DC=3, ... Naked eye ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 5.3. Altura: 64°. Luna a 21° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 13.024 UT: m1=3.8, Dia.=39′, DC=3, ... 20x80 B ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 5.3. Método: Sidgwick. Comparación de estrellas usando datos del catálogo Tycho-2. Altura: 58°. Luna a 30° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 13.023 UT: m1=3.8, Dia.=39′, DC=3, ... 20x80 B ... Oscar Alvarado (COAT, Lara, Venezuela) [MALE: 5.3. Método: Sidgwick. Comparación de estrellas usando datos del catálogo Tycho-2. Altura: 58°. Luna a 30° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 13.022 UT: m1=3.8, Dia.=39′, DC=3, ... 20x80 B ... Jesús Guerrero (COAT, Lara, Venezuela) [MALE: 5.3. Método: Sidgwick. Comparación de estrellas usando datos del catálogo Tycho-2. Altura: 58°. Luna a 30° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 13.021 UT: m1=3.8, Dia.=39′, DC=3, ... 20x80 B ... Ángel Reyes (COAT, Lara, Venezuela) [MALE: 5.3. Método: Sidgwick. Comparación de estrellas usando datos del catálogo Tycho-2. Altura: 58°. Luna a 30° altura sobre el horizonte Oeste-Sur-Oeste, 26% iluminada]
2018 Dec. 12.34 UT: m1=4.1, Dia.=50', DC=1, ... Naked Eye ... Seiichi Yoshida (Kailua Kona, Hawaii)
2018 Dec. 12.33 UT: m1=4.9, Dia.=40', DC=4, ... 10x66R (10x) ... Seiichi Yoshida (Kailua Kona, Hawaii)
2018 Dec. 12.18 UT: m1=4.8, Dia.=>30', DC=3, ... 10x50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 12.07 UT: m1=3.8, Dia.=>90', DC=3/, ... naked eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) 
2018 Dec. 12.06 UT: m1=4.1, Dia.=70', DC=5, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 12.06 UT: m1=4.5:, Dia.=30', DC=2, ... Naked Eye ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 12.05 UT: m1=4.8, Dia.=60', DC=4, ... 10x50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 12.04 UT: m1=4.5, Dia.=50’, DC=4, ... 10x50 B ... Alberto Anunziato (Paraná, Argentina) [No tail,  Mét. Sidgwick, Cat. Tycho II]
2018 Dec. 11.86 UT: m1=4.1, Dia.=70', DC=4/, ... Naked Eye ... Juan Jose Gonzalez (Collada del Fresno - Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10' N, 5º 54' W) [In 12x45 monocular: m1=4.3, Dia.=65', DC=4. Sidgwick method. Tycho-2 comparison stars. SQM: 21.2. Mountain location, very clear sky]
2018 Dec. 11.20 UT: m1=4.9:, Dia.=45', DC=3, ... 10x50 B ... Willian Souza (Santa Rita do Sapucai, Brazil);
2018 Dec. 11.07 UT: m1=3.9, Dia.=90', DC=3/, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 11.06 UT: m1=4.2, Dia.=60', DC=4/, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [By using 20x100 B and refletor 22-cm L(32x): Tail= 30' in PA: 55 deg. (in the reflector I could see 3 tails, in PA: 15, 55 and 80 respectively]
2018 Dec. 11.03 UT: m1=4.8, Dia.=60', DC=4, ... 10X70 B ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 11.01 UT: m1=4.5:, Dia.=60', DC=2, ... Naked Eye ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 10.99 UT: m1=4.8, Dia.=60', DC=4, ... 10x50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 10.80 UT: m1=4.7, Dia.=35', DC=5, ... 15x70 B ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 10.47 UT: m1=4.4, Dia.=84’, DC=5, ... 1.6x28 R ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude estimate made using 50mm f/1.8 camera lens as an objective and 32mm Plossl eyepiece, hand-held, giving a magnification of x1.6 (Aperture rounded to 28.0mm). Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 10.46 UT: m1=4.4, Dia.=84’, DC=4, ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Coma very large and diffuse. Enhances strongly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 10.46 UT: m1=4.5, Dia.=63’, DC=5, ... 3.3x28 R ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude estimate made using 50mm f/1.8 camera lens as an objective and 15mm Plossl eyepiece, hand-held, giving a magnification of x3.3 (Aperture rounded to 28.0mm). Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 10.45 UT: m1=4.8, Dia.=56’, DC=4/, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight. Coma transparent, inner coma opaque, moderately condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 10.44 UT: m1=5.3, Dia.=25', DC=1, ... 10x66R (10x) ... Seiichi Yoshida (Honolulu, Hawaii)
2018 Dec. 10.01 UT: m1=4.0:, Dia.=70', DC=3, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Clouds]
2018 Dec. 10.00 UT: m1=4.2:, Dia.=45', DC=4, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Clouds]
2018 Dec. 10.01 UT: m1=5.0:, Dia.=20', DC=3, ... 10x42 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 09.99 UT: m1=5.0, Dia.=20', DC=3, ... 15x70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Dec. 09.91 UT: m1=4.8, Dia.=40’, DC=3, ... 10x50 B ... Alberto Anunziato (Paraná, Argentina) [No tail. Mét. Sidgwick, Cat. Tycho II]
2018 Dec. 09.87 UT: m1=5.1, Dia.=42', DC=3, ... 5x25 B ... Valentín Díaz (La Romaneta, Alicante, España)
2018 Dec. 09.86 UT: m1=5.2, Dia.=42', DC=3, ... 10x50 B ... Valentín Díaz (La Romaneta, Alicante, España)
2018 Dec. 09.80 UT: m1=4.5, Dia.=36', DC=5, ... 15x70 B + Naked Eye ... Danil Sidorko (Korenovsk, Russia)
2018 Dec. 09.33 UT: m1=5.0, Dia.=40’, DC=3, ... 10x50 B ... Alberto Anunziato (Paraná, Argentina) [No tail. Mét. Sidgwick, Cat. Tycho II]
2018 Dec. 09.21 UT: m1=4.3, Dia.=60', DC=4, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 09.088 UT: m1=4.2 Dia.=27', DC=4, ... 20-cm SCT f/10(50x); ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación Tycho-2. Altura: 89°]
2018 Dec. 09.087 UT: m1=4.2 Dia.=27', DC=4, ... 20-cm SCT f/10(50x) ... Oscar Alvarado (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación Tycho-2. Altura: 89°]
2018 Dec. 09.086 UT: m1=4.2 Dia.=27', DC=4, ... 20-cm SCT f/10(50x) ... Jesús Guerrero (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación Tycho-2. Altura: 89°]
2018 Dec. 09.085 UT: m1=4.2 Dia.=27', DC=4, ... 20-cm SCT f/10(50x) ... Ángel Reyes (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación Tycho-2. Altura: 89°]
2018 Dec. 09.066 UT: m1=3.9, Dia.=74', DC=3, ... 20×80 B ... Roger Jimenez (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación: Tycho-2. Altura: 76°]
2018 Dec. 09.065 UT: m1=3.9, Dia.=74', DC=3, ... 20×80 B ... Oscar Alvarado (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación: Tycho-2. Altura: 76°]
2018 Dec. 09.064 UT: m1=3.9, Dia.=74', DC=3, ... 20×80 B ... Jesús Guerrero (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación: Tycho-2. Altura: 76°]
2018 Dec. 09.063 UT: m1=3.9, Dia.=74', DC=3, ... 20×80 B ... Ángel Reyes (COAT, Lara, Venezuela) [MALE: 6.10. Método: Sidgwick. Comparación: Tycho-2. Altura: 76°]
2018 Dec. 09.06 UT: m1=4.5, Dia.=35’, DC=3, ... 15x70 B ... Mariano Ribas (Pardo, Pcia. de Buenos Aires, Argentina) [La coma del cometa presenta una baja concentración y, visualmente, un débil tono gris verdoso que se hace más patente cerca del núcleo. A simple vista es un objeto poco llamativo, aunque mucho más patente con visión avertida)
2018 Dec. 09.05 UT: m1=5.0, Dia.=85', DC=4, ... 10x70 B ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 08.99 UT: m1=5.0, Dia.=88', DC=4, ... 11.4-cm L(60x) ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 08.93 UT: m1=4.6, Dia.=60', DC=3, ... 3.3-cm R(5x) ... Carlos Labordena (Castellón, España)
2018 Dec. 08.80 UT: m1=4.5, Dia.=45', DC=3, ...15x70 B + Naked Eye ... Danil Sidorko (Korenovsk, Russia) [in culmination, alt= 40 degrees above the horizon] 
2018 Dec. 08.70 UT: m1=4.7, Dia.=25', DC=2/, ...15x70 B ... Danil Sidorko (Korenovsk, Russia) [alt= 30 degrees above the horizon]
2018 Dec. 08.50 UT: m1=4.4, Dia.=60', ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 08.48 UT: m1=4.9, Dia.=63.5’, DC=3, ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Coma large and diffuse, opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 08.47 UT: m1=4.9, Dia.=53’, DC=5, ... 3.3x28 R ... Chris Wyatt (Walcha, NSW, Australia) [Magnitude estimate made using 50mm f/1.8 camera lens as an objective and 15mm Plossl eyepiece, hand-held, giving a magnification of x3.3 (Aperture rounded to 28.0mm) Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 08.47 UT: m1=4.8, Dia.=44’, DC=5, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Transparent outer coma gradually brightening to an opaque inner coma and well condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 08.04 UT: m1=5.2, Dia.=80', DC=3, ... 10x70 B ... Jorge Luis Salas (San Diego, Carabobo, Venezuela)
2018 Dec. 07.95 UT: m1=5.1, Dia.=35', DC=2, ... 5x25 B ... Valentín Díaz (Elche capital, España)
2018 Dec. 07.49 UT: m1=4.4:, ... Naked eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 07.47 UT: m1=5.0, Dia.=49’, DC=5, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Visible naked eye but close to stars. Star on NE edge of coma. Coma very opaque, well condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 07.20 UT: m1=5.0, Dia.=30', DC=3, ... 10x50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 07.04 UT: m1=4.4, Dia.=60', DC=4, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 07.05 UT: m1=4.1:, Dia.=80', DC=3, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 06.99 UT: m1=5.1, Dia.=>30', DC=3, ... 10x50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 06.83 UT: m1=5.0, Dia.=65', DC=3/, ... 12x45 monocular ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Several stars inside the coma, the brightest being mag. 3.9 (TK), not allowing a naked eye estimate. Sidgwick method. Tycho-2 comparison stars]
2018 Dec. 06.50 UT: m1=4.7, Dia.=60', ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 06.45 UT: m1=4.8, Dia.=55’, DC=3, ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Large coma, opaque centre, diffuse outer. Enhances strongly in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Dec. 06.45 UT: m1=5.1, Dia.=48’, DC=5, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, brightening to a well condensed opaque centre. Pale aqua-blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Dec. 06.22 UT: m1=5.1, Dia.=>30', DC=3, ... 10x50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 06.05 UT: m1=4.2:, Dia.= 80', DC=3, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 06.04 UT: m1=4.5, Dia.= 60', DC=4, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 06.04 UT: m1=4.8, Dia.=36', DC=2, ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [MALE: 4.25. Método: Sidgwick. Comparación: carta X23594PO AVSSO. Altura: 57°]
2018 Dec. 06.04 UT: m1=5.2, Dia.=30', DC=3, ... 10x50 B ... Willian Souza (Santa Rita do Sapucai, Brazil)
2018 Dec. 05.90 UT: m1=4.7, Dia.=60', DC=3, ... 3.3-cm R(5x) ... Carlos Labordena (Castellón, España)
2018 Dec. 05.04 UT: m1=4.9, Dia.=27', DC=2, ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [MALE: 4.25. Método: Sidgwick. Comparación: carta X23582BE AVSSO. Altura: 56°]
2018 Dec. 04.10 UT: m1=4.3:, Dia.=75', DC=2/, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 04.09 UT: m1=4.5, Dia.=50', DC=3, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Dec. 03.91 UT: m1=5.6, Dia.=40', DC=2, ... 10x50 B ... Valentín Díaz (La Romana, Alicante, España)
2018 Dec. 03.50 UT: m1=4.8, Dia.=75', ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 03.02 UT: m1=5.5, Dia.=20', DC=2, ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [light pollution]
2018 Dec. 02.05 UT: m1=5.0, Dia.=40', DC=3, ... 45-cm L f/4.4(50x) ... Roger Jimenez (COAT, Lara, Venezuela)
2018 Dec. 02.04 UT: m1=5.0, Dia.=40', DC=3, ... 45-cm L f/4.4(50x) ... Jesús Guerrero (COAT, Lara, Venezuela)
2018 Dec. 02.03 UT: m1=5.0, Dia.=40', DC=3, ... 45-cm L f/4.4(50x) ... Geonell Romero (COAT, Lara, Venezuela)
2018 Dec. 02.02 UT: m1=5.0, Dia.=40', DC=3, ... 45-cm L f/4.4(50x) ... Rebeca Mendoza (COAT, Lara, Venezuela)
2018 Dec. 01.50 UT: m1=5.6, Dia.=28', DC=3, ... 10x70R ... Seiichi Yoshida (Gunma, Japan)
2018 Dec. 01.49 UT: m1=5.1:, ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Dec. 01.44 UT: m1=5.1, Dia.=56’, DC=3, ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye; Coma diffuse, sometimes appears faintly stellar in periods of good seeing. Observing altitude at 1250m, approximately 30kms East of Walcha. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Dec. 01.43 UT: m1=5.4, Dia.=48’, DC=4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma large and diffuse, opaque centre, pale-aqua blue in colour, enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 30.93 UT: m1=5.3, Dia.=35', DC=3, ... 10-cm B(25x) ... Carlos Labordena (Castellón, España)
2018 Nov. 30.81 UT: m1=4.7, Dia.=80', DC=3, ... Naked Eye ... Juan Jose Gonzalez (Collada del Fresno - Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10' N, 5º 54' W) [In 12x45 monocular: m1=4.8, Dia.=110', DC=2/. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Nov. 30.51 UT: m1=4.9, Dia.=60, ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Nov. 30.44 UT: m1=5.2, Dia.=58’, DC= 3, ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Coma was easier to see when curling thumb and forefinger around my eye to reduce my field of view, gradually became easier to spot directly once fully dark adapted. Sometimes appears stellar in good seeing. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 30.43 UT: m1=5.6, Dia.=28', DC=2, ... 10x70R ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 30.43 UT: m1=5.6, Dia.=37’, DC=4/, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Very small white centre surrounded by opaque inner coma, gradually fading to transparent outer coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 30.08 UT: m1=5.9, Dia.=20', DC=2/, ... 20×80 B ... Roger Jimenez (Barquisimeto, Venezuela) [Polución lumínica]
2018 Nov. 29.79 UT: m1=6.8, Dia.=25', DC=3, ... 6-cm B(20x) ... Alexsandr Morozov (Novozybkov, Russia) [method S, Lm=6.44]
2018 Nov. 29.48 UT: m1=5.3, Dia.=72.0’, DC=3, ... Naked Eye ... Chris Wyatt (Walcha, NSW, Australia) [Naked eye. Limiting magnitude= 6.5, With Swan Band filter the coma appears slightly larger. Very diffuse, almost directly overhead. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 29.48 UT: m1=5.7, Dia.=37’, DC=4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Large transparent outer coma, gradually brightening to an opaque inner coma, aqua-blue in colour, with a moderately condensed centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 29.04 UT: m1=5.0:, Dia.=60', DC=2, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 29.03 UT: m1=5.2, Dia.=45', DC=2/, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 28.88 UT: m1=6.8, Dia.=11’, DC=2, ... 25x100 B ... Martin Lehky (Czech Republic)
2018 Nov. 28.19 UT: m1=5.4, Dia.=55', DC=2/, ... 20×80 B ... Roger Jimenez (COAT, Saroche, Venezuela)
2018 Nov. 28.18 UT: m1=5.4, Dia.=55', DC=2/, ... 20×80 B ... Oscar Alvarado (COAT, Saroche, Venezuela)
2018 Nov. 28.17 UT: m1=5.4, Dia.=55', DC=2/, ... 20×80 B ... Angel Reyes (COAT, Saroche, Venezuela)
2018 Nov. 28.08 UT: m1=5.3, Dia.=45', DC=2/, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 27.84 UT: m1=5.6, Dia.=20', DC=2, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Nov. 27.04 UT: m1=5.2:, Dia.=60', DC=2, ... Naked Eye ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 27.03 UT: m1=5.4, Dia.=45', DC=2/, ... 4 x 50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 26.96 UT: m1=6.4, Dia.=15', DC=3, ... 15x70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Nov. 26.47 UT: m1=5.0, Dia.=45', ... Naked Eye ... David A. J. Seargent (Cowra, NSW, Australia) [Enhanced through Swan Band filter]
2018 Nov. 26.42 UT: m1=5.7, Dia.=36’, DC=4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Enhances in Swan Band filter. Mag 8.3 star in coma. Comet was faintly visible naked eye but difficult to obtain a naked eye magnitude estimate, however, the naked eye coma diameter was made out to about 1 degree. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 26.00 UT: m1=5.4, Dia.= 40', DC=2, ... 4x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 25.42 UT: m1=6.1, Dia.=28’, DC=4, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Close to mag 6.4 star, at the Western edge of coma. Moderately condensed, semi-transparent outer coma, opaque inner coma. Possible naked eye but too close to star to be certain. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 24.41 UT: m1=6.0, Dia.=30’, DC=3/, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Sky slightly hazy with thin cloud, moon rising. Windy conditions. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 22.08 UT: m1=5.5:, Dia.=30', DC=2, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [strong moonlight]
2018 Nov. 20.91 UT: m1=7.1, Dia.=7', DC=2,  ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2018 Nov. 17.96 UT: m1=6.4, Dia.=10', DC=3, ... 15x70 B ... Willian Souza (Sao Paulo, Brazil)
2018 Nov. 17.69 UT: m1=5.9, ...Naked eye ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Nov. 17.69 UT: ---. Dia.=24', ... 10x50 B ... David A. J. Seargent (Cowra, NSW, Australia)
2018 Nov. 16.00 UT: m1=5.7, Dia.=32', DC=2/ ... 12x45 monocular ... Juan Jose Gonzalez (Collada del Fresno - Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10' N, 5º 54' W) [Altitude: 15 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Nov. 14.08 UT: m1=6.7, Dia.=28', DC=3, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 13.98 UT: m1=6.8, Dia.=10', DC=3, ... 10-cm R f/5(34x) ... Willian Souza (Sao Paulo, Brazil);
2018 Nov. 13.08 UT: m1=6.8, Dia.=25', DC=3, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 13.00 UT: m1=6.2, Dia.=27', DC=2/, ... 12x45 monocular ... Juan Jose Gonzalez (Collada del Fresno - Sierra del Aramo, Asturias, Spain. Alt. 1280 m, 43º 10' N, 5º 54' W) [Altitude: 14 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.9]
2018 Nov. 12.04 UT: m1=6.8, Dia.=25', DC=3, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 11.67 UT: m1=6.6, Dia.=28’, DC=3, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Bright stars in coma, opaque centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 11.17 UT: m1=6.9, Dia.=25', DC=3, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 10.98 UT: m1=8.2, Dia.=11', DC=2, ... 20x80 B ... Valentín Díaz (La Romana, Alicante, España)
2018 Nov. 10.64 UT: m1=7.3, Dia.=29’, DC=3/, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma large, diffuse, moderately condensed. Enhances in Swan Band filter. Faint stars in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 08.49 UT: m1=7.3, Dia.=28’, DC=3, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma large, circular, diffuse opaque centre. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Nov. 06.89 UT: m1=8.4, Dia.=10’, DC=2, ... 25x100 B ... Martin Lehky (Czech Republic)
2018 Nov. 06.06 UT: m1=7.8, Dia.=20', DC=2/, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 06.05 UT: m1=7.9, Dia.=18', DC=3, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 05.93 UT: m1=7.6, Dia.=12', DC=3, ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Nov. 05.15 UT: m1=7.9, Dia.=18', DC=2, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 05.14 UT: m1=8.1, Dia.=15', DC=2/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 04.01 UT: m1=7.4, Dia.=15', DC=3, ... 10x50 B ... Juan Jose Gonzalez (Pandorado, Leon, Spain. Alt. 1190 m, 42º 47' N, 6º 00' W) [Altitude: 14 deg. In 25x100B: m1=7.7, Dia.=12', DC=3. In 20 cm SCT (77x): m1=8.1, Dia.=9', DC=3/. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Nov. 03.63 UT: m1=8.5, Dia.=7', DC=2, ... 40.0-cm L f/4.5(36x) ... Seiichi Yoshida (Gunma, Japan)
2018 Nov. 03.41 UT: m1=7.7, Dia.=20’, DC=3, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma close to faint stars, slight interference. Very tenuous outer coma. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 02.99 UT: m1=8.0, Dia.=18', DC=2, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Nov. 02.98 UT: m1=8.2, Dia.=15', DC=2/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 31.08 UT: m1=8.3, Dia.=12', DC=2/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 31.09 UT: m1=8.1, Dia.=14', DC=2, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 30.51 UT: m1=8.0, Dia.=12', ... 10x50 B ... David A. J. Seargent (Cowra, NSW, Australia) [Also visible in 6x35 binoculars]
2018 Oct. 30.43 UT: m1=8.4, Dia.=22’, DC=3/, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, faint stars in coma. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Oct. 30.09 UT: m1=8.2, Dia.=12', DC=2, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 30.08 UT: m1=8.4, Dia.=10', DC=2/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 29.89 UT: m1=8.8, Dia.=5', DC=2, ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2018 Oct. 29.46 UT: m1=7.9, Dia.=15', ... 25x100 B ... David A. J. Seargent (Cowra, NSW, Australia) 
2018 Oct. 29.42 UT: m1=8.6, Dia.=20’, DC=3/, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma diffuse, slightly brighter and opaque in centre. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Oct. 29.06 UT: m1=8.7, Dia.=6′, DC=3, .. 25-cm L(45x) ... Gonzalo Vargas (Cochabamba, Bolivia) [Wide coma and very diffuse centre, more clear view using an SkyGlow filter]
2018 Oct. 29.06 UT: m1=8.6, Dia.=8', DC=2/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [clouds]
2018 Oct. 27.40 UT: m1=8.5, Dia.=20’, DC=3, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Very diffuse coma, opaque centre. Coma centre enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= S, Cat= TK]
2018 Oct. 22.06 UT: m1=9.5, Dia.=5', DC=2/, ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil);[ moonlight; little enhancement with comet filter ]
2018 Oct. 20.11 UT: m1=9.2, Dia.=8', DC=2/, ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Altitude: 11 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.0]
2018 Oct. 16.07 UT: m1=9.6, Dia.=7', DC=2/, ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Alto del Castro, Leon, Spain. Alt. 1720 m, 42º 54' N, 5º 48' W) [Mag. 11.2 (TK) star in coma. Altitude: 16 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 21.1]
2018 Oct. 13.21 UT: m1=10.3, Dia.=4', DC=3, ... 22-cm L(60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 08.44 UT: m1=9.9, Dia.=10.2’, DC=4, ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very large and diffuse, enhances well in Swan band filter. Semi-transparent outer coma, slightly more condensed at centre and opaque. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Oct. 07.71 UT: m1=11.9, Dia.=3.0', DC=3/, ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.61 UT: m1=11.4, Dia.=1.7', DC=3/, ... 40.0-cm L f/4.5(75x) ... Seiichi Yoshida (Gunma, Japan)
2018 Oct. 06.21 UT: m1=11.4, Dia.=2', DC=2, ... 22-cm L(160x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2018 Oct. 04.00 UT: m1=10.6, Dia.=4', DC=2/, ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55' N, 5º 50' W) [Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.8]
2018 Oct. 01.42 UT: m1=10.9, Dia.=4.8’, DC=2, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma very diffuse and difficult, weakly condensed. Enhances with Swan Band filter applied and the coma appears to be a little larger. Sky slightly hazy. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 30.96 UT: m1=11.7, Dia.=1.5', DC=2, ... 23.5-cm SCT(138x) ... Carlos Labordena (Castellón, España)
2018 Sep. 27.40 UT: m1=11.0, Dia.=5’, DC=2/, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Moonlight interference. Moon -2.1° altitude. Difficult, very diffuse and weakly condensed. Enhances slightly in Swan Band filter. Low altitude= 17.2°. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 19.12 UT: m1=11.6, Dia.=2.0', DC=2/, ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55' N, 5º 50' W) [Altitude: 25 deg. Observation made under better conditions, providing a wider coma diameter and brighter magnitude estimate in comparison with my previous Sep. 10 observation. Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 Sep. 18.73 UT: m1=12.4, Dia.=3.4’, DC=2, ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances slightly in Swan Band filter. Very diffuse. Sky slightly hazy due to dust. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2018 Sep. 17.70 UT: m1=[13.4, negative, ... 40.0-cm L f/4.5(257x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 16.70 UT: m1=[13.6, negative, ... 40.0-cm L f/4.5(144x) ... Seiichi Yoshida (Gunma, Japan)
2018 Sep. 10.10 UT: m1=12.4, Dia.=1.5', DC=3, ... 20-cm SCT(133x) ... Juan Jose Gonzalez (Aralla, Leon, Spain. Alt. 1720 m, 42º 55' N, 5º 50' W) [Altitude: 27 deg. Sidgwick method. APASS comparison stars. SQM: 21.3]
2018 Sep. 09.74 UT: m1=13.6, Dia.=1.3’, DC=3, ... 25-cm L f:5(83x) ... Chris Wyatt (Walcha, NSW, Australia) [Difficult. Very diffuse. Comparison stars checked using APASS data in Guide 9.0, Method= S, Cat= AQ]
2002 Nov. 07.14 UT: m1=11.6, Dia.=2', DC=2 ... 20.3-cm L (63x) ... Piotr Guzik (Krosno, Poland) [Faint diffuse object]
2002 Nov. 04.80 UT: m1=11.8:, Dia.=3', DC=2 ... 32-cm L (58x) ... Yoshimi Nagai (Yamanashi, Japan) [in Zodiacal light. comet is diffusing, hard object]
2002 Nov. 02.81 UT: m1=11.5:, Dia.=4', DC=2 ... 32-cm L (58x) ... Yoshimi Nagai (Yamanashi, Japan) [in Zodiacal light]
2002 Oct. 19.13 UT: m1=10.8, Dia.=3', DC=3 ... 20.3-cm L (63x) ... Piotr Guzik (Krosno, Poland) [Easily visible, quite large object, a bit brighter than expected]
2002 Oct. 16.81 UT: m1=11.1, Dia.=2.0', DC=2 ... 32-cm L (58x) ... Yoshimi Nagai (Yamanashi, Japan) [comet is diffusing]
2002 Oct. 12.82 UT: m1=10.7, Dia.=2.6', DC=3 ... 32-cm L (58x) ... Yoshimi Nagai (Yamanashi, Japan)
2002 Oct. 02.19 UT: m1=9.2, Dia.=4', DC=3 ... 20-cm SCT (77x) ... Juan Jose Gonzalez (Puerto de la Cubilla, alt. 1610 m, Asturias, North Spain) [Moonlight]
2002 Oct. 01.79 UT: m1=10.3, Dia.=2.0', DC=6 ... 32-cm L (58x) ... Yoshimi Nagai (Yamanashi, Japan) [clear object]
2002 Sep. 30.13 UT: m1=8.8:, Dia.=1.5', DC=4 ... 25x100 B ... Werner Hasubick (Buchloe, Germany)
2002 Sep. 28.49 UT: m1=9.6, Dia.=2', DC=4 ... 20-cm L ... Alan Hale (Cloudcroft, New Mexico) [fairly bright moonlight. There clearly seems to have been an outburst of some sort; the comet is brighter -by almost two magnitudes- than it was at my previous observation in mid-September]
2002 Sep. 28.18 UT: m1=10.6, Dia.=2', DC=3, no tail ... 20-cm SCT (50x) ... Carlos Labordena (Castellon, Spain)
2002 Sep. 26.19 UT: m1=8.7, Dia.=4', DC=3 ... 11x80 B ... Juan Jose Gonzalez (Puerto de Aralla, alt.1720 m, Leon, North Spain) [Possibly in outburst. Moonlight, observation made under good conditions, from a mountain location]
2002 Sep. 26.18 UT: m1=8.8, Dia.=5', DC=5 ... 20-cm SCT (36x) ... Juan Jose Gonzalez (Puerto de Aralla, alt.1720 m, Leon, North Spain) [Possibly in outburst. Moonlight; observation made under good conditions, from a mountain location]
2002 Sep. 12.10 UT: m1=10.6, Dia.=2.5', DC=2 ... 20.3-cm L (108x) ... Piotr Guzik (Krosno, Poland) [Easy object thanks to very transparent sky]
2002 Sep. 09.12 UT: m1=10.5, Dia.=2.9', DC=4 ... 25x100 B ... Werner Hasubick (Buchloe, Germany)
2002 Sep. 08.14 UT: m1=13.5, Dia.=10", DC=7 ... 45-cm f:4.5 L (160x) ... Jo Jones & Gary Gawthrope (Hoober Obs, Rotherham, England)
2002 Sep. 05.10 UT: m1=10.5:, Dia.=2', DC=2 ... 20-cm L (63x) ... Piotr Guzik (Krosno, Poland)
Advertisements