COMET OBSERVATIONS - Cometary Section of LIADA.

Last Updated: January 6, 2012.

C/2011 W3 (Lovejoy)
2012 Jan. 06.292 UT: m1=8.5, Dia.=7', DC=1, cauda 1º em AP 210 graus; 20X100 B; Marco Goiato (Araçatuba, Brasil) [altitude do cometa: 19º]
2012 Jan. 04.69 UT: m1=7.1, Tail= 31 degrees in PA= 221 degrees; 6x35 B & Naked eye; David A. J. Seargent (Cowra, NSW, Australia) [Tail very faint in a very clear sky]
2012 Jan. 04.312 UT: m1=8.1, Dia.=5', DC=2; 20X100 B; Marco Goiato (Araçatuba, Brasil) [altitude do cometa: 20º]
2012 Jan. 03.68 UT: m1=6.9, Tail= 20 degrees in PA= 218 degrees; 6x35 B; David A. J. Seargent (Cowra, NSW, Australia) [Tail very faint. barely glimpsed using averted vision. Patches of high cloud, but cleared from region of comet.]
2012 Jan. 03.28 UT: m1=6.6; 11x80 B; Jose G. de S. Aguiar (Campinas, Brazil)
2012 Jan. 02.69 UT: Tail= 42 degrees in PA= 224 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia) [Head of comet hidden by high cloud, but tail more readily visible than previous morning]
2012 Jan. 02.29 UT: m1=6.3; 11x80 B; Jose G. de S. Aguiar (Campinas, Brazil)
2012 Jan. 02.271 UT: m1=6.5, Dia.=12', DC=3, cauda 10º em AP 225 graus; 7X50 B; Marco Goiato (Araçatuba, Brasil) [Nuvens, altitude do cometa: 13º]
2012 Jan. 01.68 UT: m1=6.7; 6x35 B; David A. J. Seargent (Cowra, NSW, Australia) [Coma just a slight intensification and "swelling" at end of tail. May be a little more differentiated from rest of tail than in early observations as it maintains its general form while tail fades]
2012 Jan. 01.68 UT: m1=6.7, Tail: 26 degrees in PA= 222 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia) [Tail considerably fainter than previous morning (though sky may not have been quite as transparent). Only clearly seen using averted vision.]
2011 Dec. 31.67 UT: m1=6.6, Dia.=18', DC=0; 6x35 B; David A. J. Seargent (Cowra, NSW, Australia)
2011 Dec. 31.67 UT: Tail: 39 degrees in PA: 223 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia) [Tail clear of most of Milky Way. Very faint, but with averted vision extended well beyond Musca into Carina. Limiting stellar magnitude near end of tail was about 6.5]
2011 Dec. 30.69 UT: m1=6.4; 6x35 B; David A. J. Seargent (Cowra, NSW, Australia)
2011 Dec. 30.69 UT: Tail: 26 degrees in PA: 225 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia) [Tail fainter than previous mornings. Noticeably less intense than Small Magellanic Cloud]
2011 Dec. 30.31 UT: m1=5.8; 11x80 B; Jose G. de S. Aguiar (Campinas, Brazil)
2011 Dec. 29.70 UT: m1=6.3, Dia.=14'; DC=0; 6x35 B; David A. J. Seargent (Cowra, NSW, Australia)
2011 Dec. 29.70 UT: Tail: 34 degrees in PA: 230 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia) [Tail at brightest part slightly less intense than Small Magellanic Cloud]
2011 Dec. 29.30 UT: m1=5.6; 11x80 B; Jose G. de S. Aguiar (Campinas, Brazil)
2011 Dec. 29.28 UT: m1=5.0, Dia.=15', DC=1, tail= 5 deg in P.A. 230.; 10x50 B; Alexandre Amorim (Florianopolis, Brazil) [comet alt. 21 deg, tail= 15 deg through naked eye]
2011 Dec. 28.71 UT: m1=6.5; 6x35 B; David A. J. Seargent (Cowra, NSW, Australia)
2011 Dec. 28.71 UT: Tail: 32 degrees in PA: 230 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia) [Essentiall a headless tail as seen naked eye]
2011 Dec. 28.30 UT: m1=4.9, Dia.=15', DC=1, tail >30deg in PA 225 deg.; 7x50 B; Willian Souza (Maresias, Brazil)
2011 Dec. 28.30 UT: m1=5.2; 11x80 B; Jose G. de S. Aguiar (Campinas, Brazil)
2011 Dec. 27.63 UT: Tail: 27 degrees; David A. J. Seargent (Cowra, NSW, Australia) [More difficult against background of Milky Way band]
2011 Dec. 27.31 UT: m1=5.0, Dia.=12’, DC=1, Cola: 35º en AP 135º; 10X50 B y a simple vista; Alberto Anunziato (Oro Verde, Argentina) [Mét.Sidgwick, Cat. Tycho II]
2011 Dec. 27.31 UT: m1=4.9; 11x80 B; Jose G. de S. Aguiar (Campinas, Brazil)
2011 Dec. 26.69 UT: m1=5.3, Dia.=4’; DC=0: 25x100 B; David A. J. Seargent (Cowra, NSW, Australia) [Coma appeared as a slight brightening of nebulous sunward end of tail. Transparent and totally diffuse]
2011 Dec. 26.69 UT: Tail: 37 degrees in PA: 230 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia) [Tail fairly uniform over most of its length and slightly more intense than Small Magellanic Cloud]
2011 Dic. 26.292 UT: m1=3.5, Dia.=15’, DC=2, Cola: 28º; simple vista y 15x70 B; Mariano Ribas (Chascomús, Pcia. de Buenos Aires, Argentina). [Cielo despejado. MALE: 6.1 Coma a 10º sobre horizonte SE, Sol 17º debajo del horizonte. El cometa luce más pálido que hace dos días, aunque la cola parece extenderse varios grados más, probablemente a causa de la mayor altura sobre el horizonte. La coma mantiene brillo suave y parejo, practicamente sin condensación alguna. La cola comenzó a asomar dos hora antes de la salida de la coma)
2011 Dec. 24.69 UT: m1=4.8, Tail: 28 degrees in PA: 240 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia)
2011 Dez. 24.312 UT: m1=3.8, Dia.=10', DC=3, cauda 20º em AP 260 graus; 7X50 B; Marco Goiato (Araçatuba, Brasil) [Crepúsculo astronômico (sol: -15° altitude), altitude do cometa: 5º, extinção atmosférica aplicada]
2011 Dic. 24.302 UT: m1=3.0, Dia.=15’, DC=2, Cola: 22º en AP: 240º; a simple vista, 10x50 y 15x70 B; Mariano Ribas (Rawson, Provincia de Buenos Aires, Argentina) [Cielo completamente despejado en la zona del cometa, y con moderada nubosidad en la zona Norte y Oeste. La coma, a 8º sobre el horizonte SE, luce extremadamente suave, pareja, casi transparente. Sin señales de un nucleo puntual y definido. La cola comenzó a verse una hora antes de la salida de la coma del cometa. MALE 6.2)
2011 Dic. 24.277 UT: m1=2.4, Dia.=15’, DC=2, Cola: 24º en AP: 235º, Ancho 30’; a simple vista y 7x50 B; Rodolfo Ferraiuolo (San Rafael, Mendoza, Argentina). [Cielo despejado. Mínima nubosidad y extinción atmosférica al este. MALE 6,5. Cola blanquecina, zonas apenas azuladas (zona más ancha; 30’de arco). Coma difusa, de brillo parejo, de 15’ en diámetro. Núcleo no visible]
2011 Dec. 22.73 UT: m1=4: 25x100 B; David A. J. Seargent (Cowra, NSW, Australia) [Little more than guess. Brightening sky and low elevation. No distinct coma and no condensation]
2011 Dec. 23.73 UT: Tail: 22 degrees in PA: 235 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia)
2011 Dez. 23.312 UT: m1=4.0, Dia.=6', DC=3, cauda 15º em AP 260 graus; olho nu; Marco Goiato (Araçatuba, Brasil) [Crepúsculo náutico, altitude do cometa: 5º, Sol: -14° altitude, nuvens]
2011 Dec. 22.73 UT: Tail: 21 degrees in PA: 245 degrees; Naked eye; David A. J. Seargent (Cowra, NSW, Australia)
2011 Dic. 22.319 UT: m1=1.7, Dia.=15’, DC=2, Cola: 18º en AP: 225º, Ancho 28’; a simple vista y 7x50 B; Miguel Castañer y Rodolfo Ferraiuolo (San Rafael, Mendoza, Argentina). [Cielo despejado. Algo de nubosidad y extinción atmosférica al este, hasta los 6º sobre el horizonte. Luna presente, sin interferir. Cometa a 6º sobre el horizonte. Cola blanquecina, algo azulada, a mitad de su extensión se curvaba algo al norte (zona más ancha; 28’de arco). Coma difusa, de brillo parejo, de 15’en diámetro. Núcleo no visible. A unos 10’ hacia el sur del borde de la cola del cometa se hallaba la estrella doble óptica, mu Scorpii].
2011 Dez. 22.319 UT: m1=2.8, Dia.=6', DC=3, cauda 20º em AP 240 graus, olho nu ; Marco Goiato (Araçatuba, Brasil);[Crepúsculo náutico ( sol: -12° altitude ), altitude do cometa: 5º, correção de extinção atmosférica aplicada]
2011 Dec. 22.30 UT: m1=2.8, Dia.=10', DC=1, tail= 13 deg. in P.A. 235 deg.; 10x50 B; Alexandre Amorim (Florianopolis, Brazil) [comet alt. 6 deg, nautical twilight]
2011 Dec. 22.30 UT: m1=3.0*, Dia.=10', DC=1, Tail 10deg in PA 235 deg.; 11x80 B; Willian Souza (Sao Paulo,Brazil) [Magnitude corrected for extinction using ICQ average table]
2011 Dec. 21.30 UT: m1=2.3*, Dia.=10', DC=1, tail >5deg in PA 235 deg.; 11x80 B; Willian Souza (Sao Paulo,Brazil) [Magnitude corrected for extinction using ICQ average table]
2011 Dez. 20.343 UT: m1=1.2, Dia.=--, DC=9; 20X100 B; Marco Goiato (Araçatuba, Brasil) [Crepúsculo civil (sol: -5° altitude), altitude do cometa: 7º, nuvens, correção de extinção atmosférica aplicada]
2011 Dic. 19.32 UT: m1=-0.5*, faint tail of 0.3 deg in PA 240 deg.; 11x80 B; Willian Souza (Sao Paulo, Brazil) [Comet Altitude ~5 deg, sun altitude ~ - 6.5 deg, Mercury and Antares used as comparsion stars.Magnitude corrected for extinction using ICQ average table]
2011 Dic. 18.33 UT: m1=-1.0*, Dia.=1', faint tail of 5´ in PA 240 deg.; 11x80 B; Willian Souza (Sao Paulo, Brazil) [Comet Altitude ~6 deg, Sun altitude ~ -2,5deg, Mercury and Antares used as comparsion stars.Magnitude corrected for extinction using ICQ average table]
2011 Dic. 17.34 UT: m1=-2.9*, Dia.= <1', DC=9, tail= 0.2 in P.A. 240 deg.; 10x50 B; Alexandre Amorim (Florianopolis, Brazil) [comet alt. 4 deg, sun alt. -0.9 deg]
2011 Dec. 05.73 UT: m1=11.2, Dia.=1', DC=4; 28cm SCT 84x); Michael Mattiazzo (Castlemaine, Victoria) [Tycho 2 VT comparison stars. Some twilight interference. Comet appears as a faint, very small but moderately condensed disk. Very little coma observable]
2011 Dez. 04.302 UT: m1=10.7, Dia.=2', DC=4; 22cm L f:6.5 (160x); Marco Goiato (Araçatuba, Brasil) [Crepúsculo astronômico, altitude do cometa: 13º]

How to Submit Observations. 

If you are going to submit observations via e-mail, please include your name, location (site, city, state/country), instrument (aperture, f/, magnification). When submitting observations, please follow the general format you see below.

2006 Nov. 03.76 UT: m1=5.3, Dia=8', DC=6; 20x90 B; Toni Scarmato (Calabria, Italy)
2006 Nov. 02.75 UT: m1=6.0, Dia.=8', DC=6; 20x50 B; Alfons Diepvens (Balen, Belgium)
2006 Nov. 01.73 UT: m1=5.6, Dia.=10', DC=6, Tail: 1deg. in PA: 40 deg.; 20x50 B; Alfons Diepvens (Balen, Belgium)
2006 Oct. 31.75 UT: m1= 5.2, Dia=15', DC=8; naked eye; Martin Lehky (Hradec Kralove, Czech Republic)
2006 Oct. 31.75 UT: m1=5.0, Dia=10', DC=6, Tail: 2.0 deg.; 20x90 B; Toni Scarmato (Calabria, Italy)
2006 Oct. 31.39 UT: m1=5.3, Dia.=13', DC=7; 10x24B; Seiichi Yoshida (Gunma, Japan) [comments go here]

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