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Discovery IAUC 9230 : comet C/2011 Q4 (SWAN)
Rob Matson and Vladimir Bezugly reported an object in SWAN imagery, which was then confirmed as a comet by Rob McNaught and Michael Mattiazzo. The comet was at perihelion at 1.1 AU near the September equinox. Although the comet was still approaching the Sun at discovery, it was receding from the Earth and expected to fade. Its discovery magnitude was 13, though visual observers made it a couple of magnitudes brighter. A few visual observations have continued into December, but do not produce a consistent light curve. The orbital period of the comet was determined to be 290 years (MPEC 2011-
Comet C/2011 Q4 (SWAN)
Photometric data obtained from FOCAS-
FoCAs 3.40
es.groups.yahoo.com/group/Cometas_Obs
10x10 20x20 30x30 40x40 50x50 60x60 SNR SB COD
OBJECT DATE TIME +/-
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COMET UTC DELTA R APER Mag AfRho +/-
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