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Comet C/2010 S1 (LINEAR)

Discovery:

IAU circular No. 9170, issued on September 24, 2010, announces the discovery by the LINEAR survey of an apparently asteroidal object found to show cometary appearance by other CCD astrometrists. The discovery observation was obtained by LINEAR on Sept. 21.3 UT with a 1.0-m f/2.15 reflector + CCD. After posting on the Minor Planet Center's NEOCP webpage, some observers have commented on the cometary appearance of this 18 magnitude object, designated C/2010 S1 (LINEAR).

Photometric data obtained from FOCAS-II software

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

OBJECT        DATE       TIME        +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

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

C/2010 S1     24/07/2011 21:23:47  15.65  15.41  15.47                       13.5  16.3  B96

C/2010 S1     24/07/2011 21:23:47*  0.06   0.09   0.11                          9   3.1  USN

C/2010 S1     21/10/2011 23:11:09  15.25  13.89                              13.2  18.3  B96

C/2010 S1     21/10/2011 23:11:09*  0.05   0.52                                 3   3.2  USN

C/2010 S1     22/10/2011 22:21:14  15.43  14.82  14.75  14.80                17.5  18.3  B96

C/2010 S1     22/10/2011 22:21:14*  0.02   0.02   0.02   0.02                   6   2.9  USN

C/2010 S1     11/11/2011 20:28:33  15.28  14.79  14.67  14.77                18.1  17.2  B96

C/2010 S1     11/11/2011 20:28:33*  0.02   0.05   0.07   0.08                   6   3.0  USN

C/2010 S1     01/07/2012 22:46:00  15.04  14.24                              16.7  17.5  B96

C/2010 S1     01/07/2012 22:46:00*  0.05   0.06                                 7   3.5  USN

C/2010 S1     06/07/2012 23:46:18  15.05  14.41  14.19  14.12  14.11  14.14  27.5  18.1  B96

C/2010 S1     06/07/2012 23:46:18*  0.10   0.12   0.10   0.08   0.07   0.07     6   3.6  USN

C/2010 S1     23/07/2012 23:40:35  15.14  14.50  14.25  14.16  14.15  14.18  32.1  18.7  B96

C/2010 S1     23/07/2012 23:40:35*  0.00   0.02   0.03   0.04   0.06   0.07     5   3.8  USN

C/2010 S1     25/07/2012 01:12:05  15.11  14.46  14.24  14.16  14.15  14.20  38.8  18.6  B96

C/2010 S1     25/07/2012 01:12:05*  0.01   0.01   0.00   0.02   0.01   0.01     3   3.3  USN

C/2010 S1     27/07/2012 00:51:30  15.16  14.54  14.33  14.23  14.21  14.25  24.8  17.4  B96

C/2010 S1     27/07/2012 00:51:30*  0.01   0.03   0.02   0.03   0.05   0.07     3   3.5  USN

C/2010 S1     07/08/2012 23:38:23  14.74  14.07  13.83  13.71  13.64  13.61  18.2  18.4  B96

C/2010 S1     07/08/2012 23:38:23*  0.00   0.05   0.07   0.07   0.06   0.06     5   4.4  USN

C/2010 S1     19/08/2012 00:52:45  14.70  14.04  13.80  13.67  13.60  13.57  21.9  18.3  B96

C/2010 S1     19/08/2012 00:52:45*  0.01   0.01   0.04   0.04   0.04   0.04     4   3.8  USN

C/2010 S1     07/09/2012 23:53:40  15.25  14.63  14.38  14.23  14.15  14.10  15.4  19.1  B96

C/2010 S1     07/09/2012 23:53:40*  0.01   0.03   0.05   0.04   0.04   0.05     7   3.8  USN

C/2010 S1     07/04/2013 03:30:18  14.49  13.80  13.49  13.39  13.37  13.41  18.0  16.2  B96

C/2010 S1     07/04/2013 03:30:18*  0.02   0.03   0.02   0.01   0.04   0.07     3   3.9  CMC

C/2010 S1     05/09/2013 21:12:30  14.39  13.71  13.32  13.11  13.01  12.96  16.7  17.8  B96

C/2010 S1     05/09/2013 21:12:30*  0.14   0.13   0.12   0.10   0.11   0.13     4   4.0  USN

C/2010 S1     06/10/2013 18:58:21  14.85  14.01  13.61  13.39  13.27  13.21  17.1  17.7  B96

C/2010 S1     06/10/2013 18:58:21*  0.01   0.01   0.01   0.00   0.00   0.00     3   3.8  CMC

C/2010 S1     16/04/2014 03:11:39  15.72  14.91  14.42  14.16  14.11  14.20   3.8  16.5  B96

C/2010 S1     16/04/2014 03:11:39*  0.06   0.09   0.09   0.09   0.15   0.20    13   3.9  USN

C/2010 S1     01/07/2014 22:56:52  15.58  14.80  14.35  14.05  13.81  13.71   7.7  17.3  B96

C/2010 S1     01/07/2014 22:56:52*  0.04   0.04   0.03   0.03   0.01   0.03     4   3.8  CMC

C/2010 S1     03/07/2014 23:05:10  15.31  14.54  14.08  13.72  13.51  13.40   4.9  17.6  B96

C/2010 S1     03/07/2014 23:05:10*  0.13   0.14   0.09   0.06   0.05   0.06     5   3.9  CMC

                                                                     AFRHO         LOG

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

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

C/2010 S1     07/04/2013 03:30:18    6.39   5.91  04.32  15.63        7675   403  3.885  B96

C/2010 S1     Not enough boxes

C/2010 S1     22/10/2011 22:21:14    6.54   7.13   4.22  15.74   18  10538   602  4.023  B96

C/2010 S1     11/11/2011 20:28:33    6.49   7.05   4.25  15.54   18  12205   674  4.087  B96

C/2010 S1     05/09/2013 21:12:30    5.36   5.95   5.14  14.86   17  11113   665  4.046  B96

C/2010 S1     06/10/2013 18:58:21    5.76   5.98   4.79  15.42   17   7711   451  3.887  B96

C/2010 S1     16/04/2014 03:11:39    6.37   6.34   4.33  16.36    4   4491  1182  3.652  B96

C/2010 S1     01/07/2014 22:56:52    5.62   6.56   4.90  16.31    8   3906   507  3.592  B96

C/2010 S1     03/07/2014 23:05:10    5.62   6.56   4.90  16.07    5   4866   993  3.687  B96