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CBET 3340 comet C/2012 X1 (LINEAR) : An apparently asteroidal object discovered by the LINEAR survey (discovery observations tabulated below), and posted at the Minor Planet Center's NEOCP webpage, has been reported to show cometary appearance by numerous CCD astrometrists elsewhere.  L. Buzzi (Varese, Italy; 0.38-m f/6.8 reflector; Dec. 9.2 UT) reports that stacked images obtained in good conditions show a compact coma 8" wide of red mag 18.8 with no tail.......    

E. Bryssinck (Kruibeke, Belgium) reports that his Bessel R-band exposures obtained remotely with a 0.5-m f/6.8 reflector, also at the same Mayhill site (see http://www.itelescope.net) on Dec. 9.4 show a condensed circular coma of diameter 13" with no tail.  Red images obtained by G. Masi and F. Nocentini ......

Comet C/2012 X1 (LINEAR)

Photometric data obtained from FOCAS-II software

COD B96

CON BRIXIIS Observatory - Eyckensbeekstraat 2, B-9150 Kruibeke, Belgium

CATALOG: USNO A2.0 / CMC-14 - BAND: R

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

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

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

C/2012 X1     17/02/2013 22:04:35  17.39  16.83  16.54  16.45  16.42  16.23   4.4  17.0  B96

C/2012 X1     17/02/2013 22:04:35*  0.08   0.07   0.09   0.19   0.32   0.35     3   3.8  CMC

C/2012 X1     04/03/2013 22:43:14  17.79  17.26  17.12  17.03                 4.5  18.0  B96

C/2012 X1     04/03/2013 22:43:14*  0.04   0.10   0.19   0.33                   3   3.9  CMC

C/2012 X1     14/03/2013 21:04:24  17.64  17.19  17.08                        5.6  17.9  B96

C/2012 X1     14/03/2013 21:04:24*  0.08   0.21   0.16                          5   3.9  CMC

C/2012 X1     10/05/2013 22:12:16  17.54  17.11  16.91                        8.4  17.5  B96

C/2012 X1     10/05/2013 22:12:16*  0.11   0.24   0.27                          4   3.5  USN

C/2012 X1     24/10/2013 04:36:56  12.37  11.28  10.63  10.15   9.79   9.50  14.8  14.7  B96

C/2012 X1     24/10/2013 04:36:56*  0.03   0.03   0.02   0.02   0.02   0.02    10   3.5  CMC

C/2012 X1     30/10/2013 05:02:16  13.12  12.17  11.67  11.28  10.98  10.73  21.3  15.9  B96

C/2012 X1     30/10/2013 05:02:16*  0.02   0.02   0.02   0.02   0.02   0.02    33   3.8  USN

C/2012 X1     13/11/2013 05:00:28  12.70  11.90  11.51  11.25  11.07  10.92  28.5  16.1  B96

C/2012 X1     13/11/2013 05:00:28*  0.03   0.02   0.03   0.03   0.03   0.03     7   5.9  CMC

C/2012 X1     15/11/2013 04:29:08  12.83  11.91  11.50  11.24  11.04  10.89  15.3  15.3  B96

C/2012 X1     15/11/2013 04:29:08*  0.02   0.04   0.05   0.05   0.05   0.05    12   3.7  CMC

C/2012 X1     14/03/2014 04:29:28  11.27  10.34   9.87   9.58   9.37   9.20  30.0  15.2  B96

C/2012 X1     14/03/2014 04:29:28*  0.01   0.01   0.01   0.01   0.01   0.01     8   3.8  USN

C/2012 X1     07/05/2014 18:50:53  12.03  11.04  10.56  10.23  10.00   9.82  27.5  19.4  Q62

C/2012 X1     07/05/2014 18:50:53*  0.05   0.09   0.11   0.11   0.12   0.12     6   2.5  USN

C/2012 X1     13/05/2014 18:14:25  11.71  10.68  10.17   9.84   9.61   9.42  17.1  17.1  Q62

C/2012 X1     13/05/2014 18:14:25*  0.46   0.53   0.57   0.60   0.61   0.61     3   2.8  USN

C/2012 X1     16/05/2014 18:13:27  11.94  11.01  10.54  10.24  10.01   9.82  32.9  17.5  Q62

C/2012 X1     16/05/2014 18:13:27*  0.06   0.08   0.08   0.09   0.09   0.10     5   2.8  USN

C/2012 X1     25/06/2014 17:05:34  12.64  11.78  11.34  11.04  10.81  10.63  28.7  18.8  Q62

C/2012 X1     25/06/2014 17:05:34*  0.01   0.01   0.01   0.01   0.01   0.02     3   2.1  CMC

                                                                     AFRHO         LOG

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

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

C/2012 X1     10/05/2013 22:12:16    3.97   3.80   6.94  17.74    8    175    21  2.244  B96

C/2012 X1     24/10/2013 04:36:56    2.95   2.24   9.34  12.49   15   4255   287  3.629  B96

C/2012 X1     30/10/2013 05:02:16    2.87   2.19   9.60  13.17   21   2063    97  3.314  B96

C/2012 X1     13/11/2013 05:00:28    2.70   2.08  10.21  12.62   29   2699    95  3.431  B96

C/2012 X1     15/11/2013 04:29:08    2.68   2.06  10.30  12.71   15   2400   157  3.380  B96

C/2012 X1     14/03/2014 04:29:28    1.96   1.62  14.08  10.81   30   4616   154  3.664  B96

C/2012 X1     07/05/2014 18:50:53    1.72   1.89  16.01  11.38   28   2837   103  3.453  Q62

C/2012 X1     13/05/2014 18:14:25    1.69   1.93  16.29  11.01   17   4027   236  3.605  Q62

C/2012 X1     16/05/2014 18:13:27    1.68   1.95  16.43  11.30   33   3113    95  3.493  Q62

C/2012 X1     25/06/2014 17:05:34    1.55   2.28  17.75  11.96   29   1979    69  3.296  Q62