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Comet 12P/PONS-
Photometric data obtained by use of FOCAS-
10x10 20x20 30x30 40x40 50x50 60x60 SNR SB COD
OBJECT DATE TIME +/-
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12P 18/05/2023 01:01:20 17.82 17.35 17.23 8.9 17.9 B96
12P 18/05/2023 01:01:20* 0.28 0.49 0.71 2 3.0 Gai
12P 04/06/2023 23:34:19 17.58 17.18 17.17 17.11 9.7 17.5 B96
12P 04/06/2023 23:34:19* 0.13 0.19 0.22 0.10 2 3.1 Gai
12P 03/08/2023 21:34:11 15.85 14.76 14.07 13.56 13.17 12.85 14.0 18.3 B96
12P 03/08/2023 21:34:11* 0.01 0.02 0.00 0.00 0.00 0.01 3 3.1 Gai
12P 07/08/2023 21:36:11 16.04 15.03 14.38 13.90 13.53 13.21 13.6 18.3 B96
12P 07/08/2023 21:36:11* 0.01 0.02 0.00 0.01 0.00 0.01 2 3.9 Gai
12P 21/08/2023 20:51:09 16.23 15.46 15.00 14.61 14.31 14.07 18.5 17.7 B96
12P 21/08/2023 20:51:09* 0.05 0.08 0.06 0.07 0.06 0.04 2 2.8 Gai
12P 09/10/2023 19:36:18 14.28 13.18 12.58 12.19 11.95 11.77 27.4 17.6 B96
12P 09/10/2023 19:36:18* 0.01 0.00 0.02 0.02 0.02 0.02 2 4.0 Gai
12P 22/10/2023 19:00:53 14.92 14.20 13.80 13.48 13.23 13.01 26.1 17.7 B96
12P 22/10/2023 19:00:53* 0.02 0.02 0.04 0.05 0.06 0.06 2 3.9 Gai
12P 05/11/2023 19:48:11 13.74 12.51 11.88 11.48 11.22 11.05 17.7 17.6 B96
12P 05/11/2023 19:48:11* 0.04 0.07 0.07 0.07 0.07 0.07 3 3.5 Gai
12P 07/11/2023 18:28:59 14.17 13.12 12.53 12.13 11.83 11.61 29.9 17.8 B96
12P 07/11/2023 18:28:59* 0.00 0.01 0.00 0.01 0.01 0.00 2 3.9 Gai
12P 15/11/2023 19:17:26 10.31 9.45 9.24 9.19 9.15 9.13 34.9 17.6 B96
12P 15/11/2023 19:17:26* 0.01 0.00 0.00 0.00 0.01 0.00 2 3.1 Gai
12P 17/11/2023 19:45:23 12.17 10.88 10.22 9.81 9.54 9.36 10.2 16.5 B96
12P 17/11/2023 19:45:23* 0.00 0.00 0.00 0.00 0.00 0.00 1 3.8 Gai
12P 20/11/2023 18:50:04 13.20 11.97 11.29 10.81 10.45 10.16 19.1 17.7 B96
12P 20/11/2023 18:50:04* 0.00 0.00 0.01 0.01 0.00 0.01 2 3.5 Gai
12P 24/11/2023 18:59:49 13.62 12.58 11.99 11.54 11.19 10.91 17.6 16.6 B96
12P 24/11/2023 18:59:49* 0.02 0.05 0.06 0.06 0.07 0.07 3 3.8 Gai
12P 28/11/2023 18:04:15 13.89 12.91 12.34 11.94 11.62 11.35 27.3 17.1 B96
12P 28/11/2023 18:04:15* 0.00 0.02 0.04 0.05 0.04 0.05 2 3.8 Gai
12P 09/01/2024 17:57:45 12.93 12.06 11.62 11.32 11.11 10.93 34.9 17.4 B96
12P 09/01/2024 17:57:45* 0.01 0.00 0.01 0.01 0.01 0.01 2 4.0 Gai
12P 16/01/2024 17:30:50 12.75 11.88 11.43 11.14 10.95 10.79 36.6 17.2 B96
12P 16/01/2024 17:30:50* 0.01 0.00 0.01 0.01 0.00 0.00 2 3.4 Gai
AFRHO LOG
COMET UTC DELTA r BOX " MAG RSR CM +/-
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12P 18/05/2023 01:01:20 4.30 4.51 6.41 18.04 9 220 25 2.342 B96
12P 04/06/2023 23:34:19 4.05 4.34 6.81 17.65 10 258 27 2.411 B96
12P 03/08/2023 21:34:11 3.46 3.74 7.98 16.27 14 500 36 2.699 B96
12P 07/08/2023 21:36:11 3.43 3.69 8.04 16.43 14 415 30 2.618 B96
12P 21/08/2023 20:51:09 3.34 3.55 8.25 16.50 19 339 18 2.530 B96
12P 09/10/2023 19:36:18 3.05 3.01 9.05 14.35 27 1468 54 3.167 B96
12P 22/10/2023 19:00:53 2.95 2.86 9.33 15.01 26 681 26 2.833 B96
12P 05/11/2023 19:48:11 2.84 2.69 9.70 13.69 18 1888 107 3.276 B96
12P 07/11/2023 18:28:59 2.83 2.67 9.76 14.17 30 1171 39 3.069 B96
12P 15/11/2023 19:17:26 2.75 2.57 10.02 10.11 35 43732 1253 4.641 B96
12P 17/11/2023 19:45:23 2.73 2.55 10.09 12.05 10 7075 694 3.850 B96
12P 20/11/2023 18:50:04 2.71 2.51 10.19 13.14 19 2464 129 3.392 B96
12P 24/11/2023 18:59:49 2.67 2.47 10.34 13.58 18 1540 87 3.187 B96
12P 28/11/2023 18:04:15 2.63 2.42 10.50 13.82 27 1146 42 3.059 B96
12P 09/01/2024 17:57:45 2.16 1.89 12.77 12.61 35 1441 41 3.159 B96
12P 16/01/2024 17:30:50 2.08 1.79 13.26 12.38 37 1493 41 3.174 B96
Discovery:
Jean Louis Pons (Marseille, France) discovered this comet on 1812 July 21.07 UT. He said it was located in Lynx. Pons described it as a small, ill-
Recovery:
William R. Brooks (Phelps, New York) accidentally discovered this comet on 1883 September 2 while searching for comets. He described it as small and estimated the magnitude as 10.
During the discovery apparition the comet first became visible to the naked eye on August 13, and by the end of August it was displaying a tail about 2 degrees long. Although magnitude estimates were not made at this time, the comet probably reached its maximum brightness around mid-
Following the comet's appearance several attempts were made to determine its orbit and astronomers quickly agreed that the orbit was a short-