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Comet P/2010 H2 (VALES)

Data obtained by use of FOCAS-II software

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

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

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

P/2010 H2     18/04/2010 22:09:47  12.09  11.59  11.47  11.43  11.42  11.41  38.7  16.1  B96

P/2010 H2     18/04/2010 22:09:47*  0.01   0.02   0.02   0.02   0.02   0.02     7   4.1  CMC

P/2010 H2     20/04/2010 10:11:46  12.55  11.83  11.59  11.48  11.43  11.40  32.8  20.4  H06

P/2010 H2     20/04/2010 10:11:46*  0.02   0.03   0.02   0.03   0.03   0.03     6   5.7  USN

P/2010 H2     21/04/2010 09:46:40  12.73  11.85  11.52  11.36  11.28  11.22  21.2  20.3  H06

P/2010 H2     21/04/2010 09:46:40*  0.02   0.04   0.05   0.05   0.05   0.05     6   5.9  CMC

P/2010 H2     21/04/2010 21:18:46  13.10  12.15  11.79  11.62  11.54  11.49  19.0  16.9  B96

P/2010 H2     21/04/2010 21:18:46*  0.01   0.01   0.01   0.01   0.01   0.01     6   3.5  CMC

P/2010 H2     22/04/2010 21:16:03  13.41  12.41  11.94  11.67  11.49  11.36  12.3  15.7  B96

P/2010 H2     22/04/2010 21:16:03*  0.06   0.10   0.12   0.16   0.20   0.24     6   3.4  CMC

P/2010 H2     23/04/2010 23:10:40  13.67  12.65  12.17  11.92  11.77  11.68  15.4  17.0  B96

P/2010 H2     23/04/2010 23:10:40*  0.03   0.02   0.01   0.02   0.02   0.02     7   3.6  CMC

P/2010 H2     25/04/2010 00:20:59  13.88  12.84  12.32  12.03  11.85  11.75  10.8  16.2  B96

P/2010 H2     25/04/2010 00:20:59*  0.03   0.03   0.02   0.02   0.02   0.02     7   3.6  CMC

P/2010 H2     02/05/2010 09:03:56  14.67  13.73  13.17  12.79  12.52  12.33  17.1  18.6  H06

P/2010 H2     02/05/2010 09:03:56*  0.01   0.02   0.02   0.03   0.03   0.03     4   4.8  CMC

P/2010 H2     06/05/2010 08:20:15  14.98  14.04  13.45  13.00  12.64  12.36  10.2  19.4  H10

P/2010 H2     06/05/2010 08:20:15*  0.10   0.06   0.05   0.06   0.06   0.07     4   3.0  CMC

P/2010 H2     07/05/2010 08:37:06  15.27  14.33  13.73  13.30  13.00  12.80  14.3  18.3  B96

P/2010 H2     07/05/2010 08:37:06*  0.04   0.04   0.05   0.05   0.03   0.03     5   3.3  USN

P/2010 H2     09/05/2010 10:18:26  15.29  14.39  13.90  13.53  13.25  13.04  14.7  17.7  D96

P/2010 H2     09/05/2010 10:18:26*  0.03   0.02   0.02   0.02   0.02   0.02     4   4.5  CMC

P/2010 H2     12/05/2010 07:11:39  15.57  14.68  14.17  13.80  13.52  13.29  11.6  18.1  H10

P/2010 H2     12/05/2010 07:11:39*  0.02   0.02   0.01   0.01   0.01   0.01     6   2.6  CMC

P/2010 H2     13/05/2010 08:35:25  15.45  14.47  13.92  13.52  13.21  12.94  12.3  20.0  H10

P/2010 H2     13/05/2010 08:35:25*  0.01   0.02   0.03   0.03   0.03   0.03     5   4.1  CMC

P/2010 H2     17/05/2010 22:05:22  15.76  14.90  14.44  14.12  13.88  13.68   5.0  16.2  B96

P/2010 H2     17/05/2010 22:05:22*  0.08   0.09   0.09   0.07   0.04   0.08     8   5.4  CMC

P/2010 H2     18/05/2010 22:43:23  14.78  14.34  14.08  13.88  13.71  13.58  40.6  17.3  B96

P/2010 H2     18/05/2010 22:43:23*  0.02   0.02   0.00   0.01   0.01   0.03     3   4.2  CMC

P/2010 H2     19/05/2010 22:56:24  15.90  15.04  14.61  14.32  14.09  13.91   8.7  17.3  B96

P/2010 H2     19/05/2010 22:56:24*  0.05   0.03   0.04   0.06   0.06   0.07     9   3.9  CMC

P/2010 H2     20/05/2010 22:49:32  15.96  15.13  14.70  14.40  14.17  13.98  10.5  17.0  B96

P/2010 H2     20/05/2010 22:49:32*  0.05   0.02   0.06   0.05   0.06   0.06     8   4.0  CMC

P/2010 H2     02/06/2010 22:14:16  16.88  15.98  15.58  15.33  15.15  15.04   4.9  17.5  B96

P/2010 H2     02/06/2010 22:14:16*  0.09   0.08   0.09   0.08   0.11   0.15     7   4.9  USN

P/2010 H2     12/06/2010 03:44:01  16.71  15.69  15.15  14.76  14.44  14.17   8.6  20.1  H10

P/2010 H2     12/06/2010 03:44:01*  0.03   0.01   0.01   0.01   0.02   0.01     6   3.9  CMC

P/2010 H2     12/06/2010 22:28:23  16.85  15.96  15.59  15.37  15.19  15.11   2.8  17.0  B96

P/2010 H2     12/06/2010 22:28:23*  0.09   0.07   0.07   0.12   0.13   0.11     8   6.4  CMC

P/2010 H2     02/07/2010 09:59:49  17.55  16.54  16.06  15.85  15.64  15.51   5.7  17.7  D96

P/2010 H2     02/07/2010 09:59:49*  0.05   0.05   0.05   0.04   0.01   0.09     4   3.2  CMC

J Vales reported on 16 april 2010  an unusually bright asteroidal object t o the Minor Planet Center, only 15 deg from opposition. J Vales observed with the 0.60-m f/3.3 Deltagraph at Crni Vrh, Slovenia.  The numerous follow-up observations reported after the discovery was announced on the NEOCP soon made it clear that the object was some 2.0-2.5 AU from the earth and therefore of absolute magnitude H = 8-9.  It was also soon clear that there were no recent observations of the object in the MPC files, and R. A. Kowalski has confirmed that it was not present (down to magnitude V = 20) in frames of the relevant region obtained by the Catalina Sky Survey as recently as Apr. 15.4 UT. Several observers, beginning with W. Ryan on Apr. 16.2 at Magdalena Ridge (2.4-m f/8.9 reflector) and E. Guido and G. Sostero on Apr. 16.4 at Mayhill, NM (0.25-m f/3.4 reflector), have indicated that the new object has an FWHM consistently wider (by perhaps 10%) than nearby field stars of similar brightness. ….  CBET 2249

Courtesy of CARA - Giovanni Sostero