C/2017 E4 (Lovejoy)

C/2017 E4 (Lovejoy) ... desintegrated
Reported observations:
2017 Apr. 24.15 UT: m1=9.4, Dia.=3', DC=2, Tail= 6', ... 20-cm SCT (50x) ... Carlos Labordena (Castellón, España)
2017 Apr. 23.02 UT: m1=10.6, Dia.=3', DC=2/, ... 13-cm L (65x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 21.16 UT: m1=9.2, Dia.=3', DC=2/, Tail= 0.2 deg. in PA: 320 deg., ... 20-cm SCT (100x) ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54' N, 5º 48' W) [No observable central condensation. The comet shows a significant fading and lower DC in comparison with my previous Apr. 7.17 observation. Sidgwick method. Tycho-2 comparison stars. SQM: 21.3 at zenith. Altitude: 12 deg. Mountain  location, very clear sky]
2017 Apr. 18.03 UT: m1=11.0 CCD, Dia.=0.90, DC=7/, Tail=10' in PA: 316 deg., ... 0.25-m f/4.7 reflector + CCD ... Serguey Shurpakov (Observatory C36, Baran’, Belarus)
2017 Apr. 08.18 UT: m1=6.9, Dia.=18', DC=6, ... 20x80 B ... J. P. Navarro Pina / Manuel Hernandez (Puerto Cadena, Murcia, Spain) [Comet very condensed and bright, altitude 400 mts]
2017 Apr. 07.17 UT: m1=7.0, Dia.=6', DC=7, no tail, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2017 Apr. 07.17 UT: m1=7.1, Dia.=5', DC=7, ... 10x50 B ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54' N, 5º 48' W) [Morris method. Tycho-2 comparison stars. SQM: 21.0 at zenith. Altitude: 17 deg. In 20 cm SCT(77x): Ion tail 0.6-deg in PA 280 deg.  Mountain  location, very clear sky]
2017 Apr. 05.79 UT: m1=7.4, Dia.=8.4’, DC=6, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Interference by twilight; Low altitude = 6.8°. Coma diffuse with stellar centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 05.36 UT: m1=6.5, Dia.=5', DC=5, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Civil twilight: Sun altitude: -11º / Comet altitude: 16º]
2017 Apr. 05.06 UT: m1=7.0, Dia.=4', DC=7, ... 13-cm L (26x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 04.36 UT: m1=6.3, Dia.=6', DC=5, ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [Civil twilight / Sun altitude: -11º]
2017 Apr. 04.16 UT: m1=6.9, Dia.=4', DC=7, ... 10x50 B ... Juan Jose Gonzalez (Puerto de Aralla, Leon, Spain; Alt. 1530 m,  42º 54' N, 5º 48' W) [Morris method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Altitude: 14 deg. In 20 cm SCT(77x): Ion tail 0.9-deg in PA 270 deg. Mountain  location, very clear sky]
2017 Apr. 03.34 UT: m1=6.5, Dia.=5', DC=7, ... 15x70 B ... Willian Souza (Sao Paulo, Brazil)
2017 Apr. 03.07 UT: m1=7.2, Dia.=5', DC=6, ... 6-cm B (20x) ... Alexsandr Morozov (Novozybkov, Russia)
2017 Apr. 02.18 UT: m1=8.5, Dia.=8', DC=6, no tail, ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2017 Apr. 02.17 UT: m1=8.3, Dia.=7', DC=5, no tail, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2017 Apr. 02.09 UT: m1=6.8, Dia.=5.5', DC=5/, ... 20x80 B ... Marek Biely (Brno, Czech Republic, 244 m.a.s.l.) [Nice, well condensed object with an elongated coma. Low altitude: 11.9 deg. above the horizon. Corrected for an atmospheric extinction by using "average" table.]
2017 Apr. 01.86 UT: m1=7.1, Dia.=7', DC=6,... 10-cm f/4 L (20x) ... Andrew Pearce (Bailup, W. Australia)
2017 Apr. 01.76 UT: m1=7.3, Dia.=8.3’, DC=6, ... 7x50 B ... Chris Wyatt (Walcha, NSW, Australia) [Coma shows bright inner coma with stellar centre, diffuse outer coma. Enhances well in Swan Band filter. Low altitude= 10.1°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Apr. 01.17 UT: m1=7.4, Dia.=5', DC=7, ... 10x50 B ... Juan Jose Gonzalez (Candanedo de Fenar, Leon, Spain; Alt. 1060 m, 42º 49' N, 5º 34' W) [Morris method. Tycho-2 comparison stars. SQM: 21.4 at zenith. Altitude: 14 deg. Mountain location, very clear sky]
2017 Mar. 31.87 UT: m1=7.4, Dia.=6.5', DC=6, ... 10-cm f/4 L (20x) ... Andrew Pearce (Bailup, W. Australia)
2017 Mar. 30.34 UT: m1=7.1, Dia.=8', DC=6, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 30.34 UT: m1=7.2, Dia.=6', DC=6/, Tail= 0.2º PA: 270 deg., ... 20x100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 29.77 UT: m1=7.6, Dia.=3.5’, DC=6, ... 25x100 B ... Michael Mattiazzo (Swan Hill, Vic, Australia)
2017 Mar. 29.34 UT: m1=7.2, Dia.=8', DC=7, ... 7x50 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 29.34 UT: m1=7.3, Dia.=6', DC=7, Tail= 0.2º PA: 280 deg., ... 20 x 100 B ... Marco Antonio Coelho Goiato (Araçatuba, Brazil)
2017 Mar. 29.18 UT: m1=8.6, Dia.=5', DC=5, no tail, ... 8-cm B(11x) ... Carlos Labordena (Castellón, España)
2017 Mar. 28.18 UT: m1=7.9, Dia.=5', DC=6/, ... 10x50 B ... Juan Jose Gonzalez (Collado del Fresno, Asturias, Spain; Alt. 1280 m, 43º 10' N, 5º 54' W) [Morris method. Tycho-2 comparison stars. SQM: 21.5 at zenith. Altitude: 14 deg. In 20 cm SCT(77x): m1=8.1. Mountain location, very clear sky]
2017 Mar. 28.18 UT: m1=9.1, Dia.=2.5', DC=6, no tail, ... 20-cm SCT(50x) ... Carlos Labordena (Castellón, España)
2017 Mar. 28.14 UT: m1=7.8, Dia.=3.5’, DC=5/, ... 15.5-cm L (29x) ... Reinder Bouma (Burlage, Germany)
2017 Mar. 27.77 UT: m1=8.6, Dia.=3’, DC=4, ... 25x100 B ... Michael Mattiazzo (Swan Hill, Vic, Australia)
2017 Mar. 27.73 UT: m1=9.1, Dia.=2.4’, DC=6, ... 25-cm L f:5 (39x) ... Chris Wyatt (Walcha, NSW, Australia) [Coma enhances in Swan Band filter, faint stellar central condensation, low altitude = 13.9°. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2017 Mar. 27.11 UT: m1=10.5, Dia.=1.8', DC=3, ... 60-cm L (188x) ... Sandor Szabo (Hungary)
2017 Mar. 25.77 UT: m1=9.0, Dia.=3.5’, DC=4, ... 25x100 B ... Michael Mattiazzo (Swan Hill, Vic, Australia) [brightening rapidly]
2017 Mar. 25.34 UT: m1=9.3, Dia.=5', DC=4/, ... 22-cm L (60x) ... Marco Antonio Coelho Goiato (Araçatuba, Brazil) [enhanced image with Swan band filter]
2017 Mar. 24.85 UT: m1=9.2, Dia.=5.5', DC=4, ... 10-cm f/4 L (20x) ... Andrew Pearce (Bailup, W. Australia)
2017 Mar. 20.21 UT: m1=8.6, Dia.=4.5', DC=3, ... 20-cm SCT (100x) ... Juan Jose Gonzalez ( Puerto de Aralla, Leon, Spain; Alt. 1530 m, 42º 54' N, 5º  48' W) [Sidgwick method. Tycho-2 comparison stars. SQM: 20.8 at zenith. Significantly brighter than expected. Wide and diffuse coma. Followed for 40 min. Motion obvious. Some moonlight interference (phase 0.54). Altitude: 13 deg. Limiting star magnitude near comet: 12.5 (APASS). Field stars checked in DSS. Mountain location, very clear sky]

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