C/2011 W3 (Lovejoy)

C/2011 W3 (Lovejoy)
2012 Jan. 23.52 UT: David A. J. Seargent (Cowra, NSW, Australia) [what could best be described as a very faint, rather broad, ribbon of sky slightly less dark than the background field was glimpsed in both 25×100 and 15×80 binoculars. Position and orientation seemed consistent with tail, but too vague for any measurement.]
2012 Jan. 22.52 UT: David A. J. Seargent (Cowra, NSW, Australia) [what could best be described as a very faint, rather broad, ribbon of sky slightly less dark than the background field was glimpsed in both 25×100 and 15×80 binoculars. Position and orientation seemed consistent with tail, but too vague for any measurement.]
2012 Jan. 17.48 UT: Tail= 1.0 degree in PA: 55 degrees... 25×100 binoculars... David A. J. Seargent (Cowra, NSW, Australia) [Very faint beam of light seen with averted vision. No real head discernible. Tail possibly glimpsed using 15×80 binoculars, but not with 6×35 binoculars.]
2012 Jan. 16.47 UT: m1=9.6... 25×100 binoculars... David A. J. Seargent (Cowra, NSW, Australia) [Very faint elongated glow. Mag. estimate of brighter region, but should not be given too much weight as no real “head” was visible.]
2012 Jan. 06.292 UT: m1=8.5, Dia.=7′, DC=1, Tail= 1º in PA: 210 deg ... 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 ... 6×35 B & Naked eye... David A. J. Seargent (Cowra, NSW, Australia) [Tail very faint in a very clear sky]
2012 Jan. 03.68 UT: m1=6.9, Tail= 20 degrees in PA: 218 degrees ... 6×35 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... 11×80 B... Jose G. de S. Aguiar (Campinas, Brazil)
2012 Jan. 02.69 UT: m1=--, 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... 11×80 B... Jose G. de S. Aguiar (Campinas, Brazil)
2012 Jan. 02.271 UT: m1=6.5, Dia.=12′, DC=3, Tail= 10º in PA: 225 deg ... 7X50 B... Marco Goiato (Araçatuba, Brasil) [Nuvens, altitude do cometa: 13º]
2012 Jan. 01.68 UT: m1=6.7... 6×35 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... 6×35 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... 6×35 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... 11×80 B... Jose G. de S. Aguiar (Campinas, Brazil)
2011 Dec. 29.70 UT: m1=6.3, Dia.=14′, DC=0... 6×35 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... 11×80 B... Jose G. de S. Aguiar (Campinas, Brazil)
2011 Dec. 29.28 UT: m1=5.0, Dia.=15′, DC=1, Tail= 5 deg in PA: 230 deg ... 10×50 B... Alexandre Amorim (Florianopolis, Brazil) [comet alt. 21 deg, tail= 15 deg through naked eye]
2011 Dec. 28.71 UT: m1=6.5... 6×35 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 ... 7×50 B... Willian Souza (Maresias, Brazil)
2011 Dec. 28.30 UT: m1=5.2... 11×80 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, Tail= 35º in PA: 135º... 10X50 B & Naked Eye... Alberto Anunziato (Oro Verde, Argentina) [Mét.Sidgwick, Cat. Tycho II]
2011 Dec. 27.31 UT: m1=4.9... 11×80 B... Jose G. de S. Aguiar (Campinas, Brazil)
2011 Dec. 26.69 UT: m1=5.3, Dia.=4’, DC=0 ... 25×100 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 Dec. 26.292 UT: m1=3.5, Dia.=15’, DC=2, Tail= 28º... Naked Eye & 15×70 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, Tail= 20º in PA: 260 deg ... 7X50 B... Marco Goiato (Araçatuba, Brasil) [Crepúsculo astronômico (sol: -15° altitude), altitude do cometa: 5º, extinção atmosférica aplicada]
2011 Dec. 24.302 UT: m1=3.0, Dia.=15’, DC=2, Tail= 22º in PA: 240º... Naked Eye, 10×50 & 15×70 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 Dec. 24.277 UT: m1=2.4, Dia.=15’, DC=2, Tail= 24º in PA: 235º, Wide: 30’... Naked Eye & 7×50 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. 23.73 UT: m1=4.0 ... 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, Tail= 15º in PA: 260 deg ... Naked Eye... Marco Goiato (Araçatuba, Brasil) [Crepúsculo náutico, altitude do cometa: 5º, Sol: -14° altitude, nuvens]
2011 Dec. 22.73 UT: m1=4: 25×100 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. 22.73 UT: Tail= 21 degrees in PA: 245 degrees ... Naked Eye... David A. J. Seargent (Cowra, NSW, Australia)
2011 Dec. 22.319 UT: m1=1.7, Dia.=15’, DC=2, Tail= 18º in PA: 225º, Wide: 28’... Naked Eye & 7×50 B... Miguel Castañer y Rodolfo Ferraiuolo (San Rafael, Mza, 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, Tail= 20º in PA: 240 deg ... Naked Eye ... 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 PA: 235 deg ... 10×50 B... Alexandre Amorim (Florianopolis, Brazil) [comet alt. 6 deg, nautical twilight]
2011 Dec. 22.30 UT: m1=3.0*, Dia.=10′, DC=1, Tail= 10 deg in PA: 235 deg ... 11×80 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 ... 11×80 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 Dec. 19.32 UT: m1=-0.5*, Faint Tail= 0.3 deg in PA: 240 deg ... 11×80 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 Dec. 18.33 UT: m1=-1.0*, Dia.=1′, Faint Tail= 5´ in PA: 240 deg ... 11×80 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 Dec. 17.34 UT: m1=-2.9*, Dia.=<1′, DC=9, Tail= 0.2 in PA: 240 deg ... 10×50 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... 28-cm 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... 22-cm L f:6.5 (160x)... Marco Goiato (Araçatuba, Brasil) [Crepúsculo astronômico, altitude do cometa: 13º]