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93P/LOVAS

93P on Cometograpy

Data obtained by use of  FOCAS-II software

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

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

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

93P           22/08/2016 22:29:36  16.99  16.70  16.66                        6.5  17.3  B96

93P           22/08/2016 22:29:36*  0.09   0.08   0.16                          5   3.7  CMC

93P           23/08/2016 23:08:58  16.37  15.93  15.76  15.69  15.67  15.64  10.0  17.5  B96

93P           23/08/2016 23:08:58*  0.44   0.31   0.26   0.30   0.38   0.45     3   3.8  USN

93P           03/10/2016 19:40:02  16.82  16.38  16.29  16.29  16.38         11.7  17.4  B96

93P           03/10/2016 19:40:02*  0.09   0.07   0.14   0.26   0.30            4   3.6  USN

93P           04/10/2016 20:08:23  16.70  16.18  16.12  15.94  15.72  15.62   5.7  17.2  B96

93P           04/10/2016 20:08:23*  0.07   0.07   0.10   0.17   0.15   0.27     3   3.6  USN

93P           05/10/2016 19:35:03  16.86  16.40  16.11  16.11                 6.8  17.2  B96

93P           05/10/2016 19:35:03*  0.07   0.12   0.12   0.20                   4   3.7  CMC

93P           18/10/2016 19:04:05  16.39  16.00  15.84  15.70  15.66          7.6  17.1  B96

93P           18/10/2016 19:04:05*  0.01   0.05   0.10   0.14   0.18            2   3.7  USN

93P           22/10/2016 18:36:50  16.54  16.10  15.92  15.87  15.86  15.91   6.9  16.8  B96

93P           22/10/2016 18:36:50*  0.09   0.09   0.05   0.10   0.15   0.33     5   3.6  USN

93P           04/12/2016 17:28:18  16.45  15.90  15.61  15.46  15.38  15.30  13.0  17.4  B96

93P           04/12/2016 17:28:18*  0.05   0.07   0.10   0.12   0.15   0.13     3   3.9  USN

93P           05/01/2017 17:29:25  16.07  15.47  15.16  14.97  14.89  14.85  13.5  16.9  B96

93P           05/01/2017 17:29:25*  0.05   0.06   0.07   0.07   0.10   0.12     6   3.8  USN

93P           19/01/2017 17:49:38  16.34  15.74  15.39  15.14  14.97  14.80   9.9  17.6  B96

93P           19/01/2017 17:49:38*  0.03   0.04   0.06   0.04   0.05   0.04     4   3.9  USN

93P           21/01/2017 18:22:48  16.14  15.51  15.23  15.08  14.99  14.94   8.8  17.3  B96

93P           21/01/2017 18:22:48*  0.04   0.03   0.03   0.04   0.04   0.07     4   3.7  USN

93P           22/01/2017 18:17:45  16.00  15.38  15.11  15.01  14.97  14.99   7.3  16.6  B96

93P           22/01/2017 18:17:45*  0.04   0.07   0.06   0.11   0.15   0.23     4   3.9  USN

                                                                     AFRHO         LOG

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

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

93P           22/08/2016 22:29:36    1.49   2.50  18.45  16.78    7     26     4  1.417  B96

93P           23/08/2016 23:08:58    1.49   2.50  18.54  16.04   10     51     5  1.707  B96

93P           03/10/2016 19:40:02    1.41   2.24  19.61  16.52   12     24     2  1.375  B96

93P           04/10/2016 20:08:23    1.41   2.24  19.57  16.29    6     29     5  1.464  B96

93P           05/10/2016 19:35:03    1.41   2.23  19.53  16.44    7     25     4  1.403  B96

93P           18/10/2016 19:04:05    1.46   2.16  18.88  16.07    8     36     5  1.553  B96

93P           22/10/2016 18:36:50    1.48   2.13  18.64  16.21    7     32     5  1.499  B96

93P           04/12/2016 17:28:18    1.73   1.91  15.95  16.09   13     39     3  1.587  B96

93P           05/01/2017 17:29:25    1.91   1.79  14.44  15.74   14     57     4  1.753  B96

93P           19/01/2017 17:49:38    1.98   1.75  13.91  16.05   10     44     4  1.642  B96

93P           21/01/2017 18:22:48    1.99   1.75  13.84  15.83    9     54     6  1.732  B96

93P           22/01/2017 18:17:45    2.00   1.74  13.80  15.69    7     62     8  1.791  B96

Discovery: IAUC 3547

Miklos Lovas (Konkoly Observatory, Hungary) found an image of this comet on a photographic plate exposed on 1980 December 5.06. He described it as diffuse, with a condensation. The magnitude was estimated as 17. The comet was officially announced by the International Astronomical Union Circular no. 3547 on December 8. Interestingly, IAU Circular 3551 announced on December 15, "No confirmation or denial of the existence of this object has been reported." This statement prompted astronomers to send their observations to the appropriate authorities. Lovas said he had photographed the comet again on December 9.01, and T. Seki (Geisei, Japan) had photographed it on December 9.77. The magnitude was still given as 17 and there was still no report of a tail.

     An independent discovery was made by C. Kowal (Palomar Observatory, California, USA), who detected the comet on a photograph exposed on December 14.46. He confirmed the find on December 15.49. Kowal was using the 1.2-m Schmidt telescope and the comet's magnitude was again given as 17.

Recovery:

The comet was recovered on 1989 July 7.77 by Seki. He found it with a 0.60-m reflector and estimated the magnitude as 17.5. He confirmed the recovery on July 13.77. The precise positions indicated the prediction required a correction of -0.22 day. The comet slowly brightened and by November and December it was brighter than magnitude 13.

The comet last passed perihelion on 1998 October 14. It was recovered on 1998 June 17.44 at Whipple Observatory (Mt. Hopkins). Observations there and at Steward Observatory (Kitt Peak, Arizona, USA) indicated the magnitude was between 17.5 and 18. The comet was widely observed by both professional and amateur astronomers as it rose to about 13th magnitude at the end of 1998 and early in 1999.