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Comet P/2010 JC81 (WISE)

MPEC 2010-V52 : 2010 JC81

Discovery:

 An unusual asteroidal object discovered with the WISE satellite (reported on MPS 326646 with a two-day arc;  MPEC 2010-V52 issued on 2010 Nov. 5 when additional observations were found in November) has been found to show cometary appearance by other CCD astrometrists.  G. V. Borisov, Crimean Laboratory, Sternberg Astronomical Institute, reports that 90-s unfiltered CCD images taken with the 20-cm f/1.5 astrograph at the Crimean Observatory at Nauchny on Aug. 1.01 UT show a faint 0'.2 coma of mag 14.7 and 0'.6 tail toward p.a. about 45 deg; additional frames taken with the Crimean 60-cm Cassegrain telescope and the 2.6-m Shajn telescope confirmed the object's cometary appearance on Aug. 2, showing a condensed coma of diameter 20" with magnitude V = 15.1.  Observations by Borisov on Aug. 4.0 with the 20-cm astrograph show a condensed coma of diameter 12" has with magnitude V = 14.8.  V. Rumyantsev, Crimean Astrophysical Observatory, writes that images taken with the 2.6-m f/4 Shajn reflector on Aug. 3.0 show a coma diameter of 20" and magnitude 15.4. A previously unconfirmed report of diffuseness with a 10" coma (red mag 18.0-18.2) from 2010 Nov. 5 was made by L. Buzzi, P. Concari, S. Foglia, G. Galli, and M. Tombelli from CCD images taken with a 0.18-m f/2.8 Newtonian reflector located at the Tzec Maun Observatory near Moorook, Australia. ( CBET 2780 : COMET P/2010 JC81 (WISE) )

It has an inclined orbit with a period of around 23 years

Photometric data from FOCAS-II software

                                   10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB   COD

COMET         UTC                    +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

------------  -------------------  -----  -----  -----  -----  -----  -----  ----  ----  ---

P/2010 JC81   16/10/2011 01:27:14  17.19  16.36  16.02  15.83  15.72  15.66   7.5  17.0  B96

P/2010 JC81   16/10/2011 01:27:14*  0.08   0.04   0.03   0.08   0.17   0.25     3   2.6  Gai

                                                                     AFRHO         LOG

COMET         UTC                   DELTA    r    BOX "   MAG   RSR    CM    +/-  AFRHO  OBS

------------  -------------------   -----  -----  -----  -----  ---  -----  ----  -----  ---

P/2010 JC81   16/10/2011 01:27:14    2.86   2.64   9.63  17.10    8     79    11  1.898  B96