Recientes observaciones de 12K5, 12F6 y 11L4.

Se recomienda seguir a los siguientes cometas de brillo medio.

C/2012 K5 (LINEAR)
2012 Dic. 23.17 UT: m1=9.3, Dia.=3′, DC=6, Tail: 0.2 deg. in PA 270 deg.; 25×100 B; Juan José González (Armada – Sierra del Aramo, alt. 980 m, Asturias, España) [En 20 cm SCT (77x): m2=12.2 (Tycho-2)]
2012 Dec. 16.84 UT: m1=9.2, Dia.=1.5′, DC=6, Tail=0.08 deg.; 20cm L (36x); Artyom Novichonok (Konchezero, Russia) [Bright, easy visible, with tail]
2012 Dec. 15.89 UT: m1=9.4, Dia.=2.2′, DC=5; 20cm L (36x); Artyom Novichonok (Konchezero, Russia)
2012 Dec. 13.20 UT: m1=9.3, Dia.=0.4′, DC=6; 40cm L (62x); Sandor Szabo (Sopron, Hungary) [Tail is 0.1 deg long to PA 310-330 deg, curved!. Head is very small but bright]

C/2012 F6 (Lemmon)
2012 Dec. 24.25 UT: m=9.5:, Dia.=1′, DC=4; 7cm R (28x); Alexandre Amorim (Florianopolis, Brazil) [close to TYC 6679-01094-1]
2012 Dec. 23.69 UT: m1=9.7, Dia.=5.5’, DC=4; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [No tail, close to bright stars, observation very difficult, faint tenuous outer coma, inner coma is bright, not stellar, moderately condensed. Comparison stars checked using Tycho-2 data in Guide 9.0; Method=S; Cat=TK]
2012 Dec. 23.29 UT: m1=9.6 (S), Dia.=6′, DC=4; 22cm L (60x); Marco Goiato (Araçatuba, Brasil)
2012 Dic. 23.20 UT: m1=8.7, Dia.=7′, DC=3; 25×100 B; Juan José González (Armada – Sierra del Aramo, alt. 980 m, Asturias, España) [En 20 cm SCT (77x): m2=12.3 (APASS)]
2012 Dec. 20.65 UT: m1=9.4, Dia.=4.2’, DC=4; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [No tail, coma large, enhances well in Swan Band filter, close to bright stars and stars in vicinity of coma centre. Comparison stars checked using Tycho-2 data in Guide 9.0; Method=S; Cat=TK]
2012 Dec. 18.67 UT: m1=9.4, Dia.=6′, DC=4; 25×100 B; Michael Mattiazzo (Castlemaine, Victoria)
2012 Dec. 18.29 UT: m1=9.6, Dia.=3′,DC=4; 18cm L (57x); Alexandre Amorim (Florianopolis, Brazil) [nautical twilight]
2012 Dec. 17.68 UT: m1=9.7, Dia.=5.5’, DC=5/6; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [No tail, coma appears elongated to the NE, small central condensation, brightish inner coma gradually tapering to edges. Close to bright stars. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= S; Cat= TK]

C/2011 L4 (PANSTARRS)
2012 Dec. 24.30 UT: m=8.1:, Dia.=1′; 18 cm L (57x); Alexandre Amorim (Florianopolis, Brazil) [altitude 8.5 deg, sun altitude -12 deg]
2012 Dec. 23.72 UT: m1=9.1, Dia.=3’, DC=5/6; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Coma small with diffuse edges, bright central condensation showing a hint of stellaring, rapidly fading to coma edge, no obvious tail was observed. Observation difficult due to low altitude, cloud in vicinity and encroaching twilight. Comet was observed in cloud gaps. Magnitude estimate not corrected for extinction. Comparison stars checked using Tycho-2 data in Guide 9.0; Method=M; Cat=TK]

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Publicado el 24/12/2012 en Anuncios, cometas, comets. Añade a favoritos el enlace permanente. Comentarios desactivados en Recientes observaciones de 12K5, 12F6 y 11L4..

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