C/2018 V1 (Machholz-Fujikawa-Iwamoto)

 

C/2018 V1 (Machholz-Fujikawa-Iwamoto)
Reported observations:
2018 Dec. 05.75 UT: m1=9.1, Dia.=3', DC=3, ... 15-cm T(30x) ... Carlos Labordena (Castellón, España)
2018 Nov. 24.23 UT: m1=8.6, Dia.=4.5', DC=6, ... 10.2-cm R(20x) ... Carlos Labordena (Castellón, España)
2018 Nov. 16.24 UT: m1=7.7, Dia.=6', DC=5, Tail= 0.4 deg. in PA: 300 deg., ... 25x100 B ... Juan Jose Gonzalez (Collada del Fresno - Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10' N, 5º 54' W) [Zodiacal light. Altitude: 18 deg. Sidgwick method. Tycho-2 comparison stars. SQM: 20.4.]2018 Nov. 16.14 UT: m1=8.2, Dia.=4', DC=4/,  ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.30]
2018 Nov. 14.32 UT: m1=7.8:, Dia.=4', DC=3, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 14°/Civil twilight with sun altitude: -10°/clouds]
2018 Nov. 14.18 UT: m1=8.7, Dia.=1.3', DC=6, ... 60-cm L(81x) ... Sandor Szabo (Sopron, Hungary)
2018 Nov. 13.32 UT: m1=8.0, Dia.=3', DC=3/, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet altitude: 13° / Nautical twilight with sun altitude: -12°]
2018 Nov. 13.23 UT: m1=8.0, Dia.=5', DC=6, Tail= 0.2 deg. in PA: 290 deg., ... 25x100 B ... Juan Jose Gonzalez (Collada del Fresno - Sierra del Aramo, Asturias, Spain. Alt. 1280 m, 43º 10' N, 5º 54' W) [Zodiacal light. Altitude: 18 deg. In 20-cm SCT (77x): m1=8.2, Dia.=4', DC=5. Sidgwick method. Tycho-2 comparison stars. SQM: 20.7]
2018 Nov. 13.12 UT: m1=7.7, Dia.=2', DC=6, ... 25.4-cm L(48x) ... Alexsandr Morozov (Novozybkov, Russia) [method M, Lm=6.65]
2018 Nov. 12.32 UT: m1=8.0:, Dia.=3', DC=4, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Comet very near a star with m1: 6.01 and 14° altitude / Nautical twilight with sun altitude: -12°]
2018 Nov. 11.73 UT: m1=8.8, Dia.=4.4’, DC=6, ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 6.0°; Twilight interference. Enhances in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 10.72 UT: m1=8.9, Dia.=2.3’, DC=5/, ... 25-cm L f:5(39x) ... Chris Wyatt (Walcha, NSW, Australia) [Low altitude= 4.9°; Slight twilight interference. Enhances well in Swan Band filter. Coma circular in shape, faintly stellar, opaque centre, no tail visible. Pale-aqua blue in colour. Comparison stars checked using Tycho-2 data in Guide 9.0, Method= M, Cat= TK]
2018 Nov. 09.22 UT: m1=9.9, Dia.=4', DC=3/, ... 20-cm SCT(77x) ... Juan Jose Gonzalez (Collada del Fresno - Sierra del Aramo, Asturias, Spain. Alt. 1221 m, 43º 10' N, 5º 54' W) [Close to the ephemeris position. Motion obvious, followed for a 50-min period. Near-stellar central condensation, m2=12.5: (GSC). Nearby field stars checked in DSS. Visual astrometry: R.A.= 12h26m.2, Decl.= -1o59'.2 (equinox 2000.0). Sidgwick method. Tycho-2 comparison stars. Mountain location, very clear sky. Altitude: 17 deg. Zodiacal light. SQM: 20.4]
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