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Comet 11P/TEMPEL-SWIFT-LINEAR

 Comet 11P/TEMPEL-SWIFT-LINEAR - Gary Kronk’s Cometography

Photometric data obtained by use of FOCAS-II software

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

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

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

11P           13/09/2020 23:29:21  18.39  18.24  18.30  18.05                 2.9  18.3  B96

11P           13/09/2020 23:29:21*  0.53   0.66   0.68   0.40                   3   3.1  Gai

11P           16/09/2020 22:12:26  18.15  17.62  17.26  17.13  17.07          4.3  17.6  B96

11P           16/09/2020 22:12:26*  0.24   0.40   0.54   0.42   0.37            3   3.0  Gai

11P           18/09/2020 23:14:17  18.28  18.02  17.90  17.80  17.58  17.34   6.1  18.2  B96

11P           18/09/2020 23:14:17*  0.14   0.37   0.50   0.62   0.64   0.71     4   3.8  Gai

11P           20/09/2020 22:35:06  18.19  17.82  17.73  17.77                 8.1  18.5  B96

11P           20/09/2020 22:35:06*  0.08   0.13   0.20   0.36                   5   3.6  Gai

11P           21/09/2020 22:09:38  18.05  17.95  17.69                        7.6  18.0  B96

11P           21/09/2020 22:09:38*  0.03   0.23   0.12                          2   3.6  Gai

11P           02/11/2020 21:07:08  16.30  15.21  14.52  13.98  13.50  13.09   6.4  17.2  B96

11P           02/11/2020 21:07:08*  0.07   0.04   0.03   0.00   0.02   0.02     2   4.0  Gai

11P           04/11/2020 21:10:51  16.73  16.09  15.74  15.59  15.43  15.31  10.5  17.9  B96

11P           04/11/2020 21:10:51*  0.09   0.06   0.08   0.13   0.08   0.06     3   3.8  Gai

11P           06/11/2020 21:12:38  16.76  16.11  15.75  15.59  15.47  15.43   7.1  18.3  B96

11P           06/11/2020 21:12:38*  0.08   0.15   0.21   0.25   0.28   0.32     3   3.9  Gai

11P           12/11/2020 22:18:53  16.82  16.20  15.84  15.64  15.42  15.31  10.8  18.2  B96

11P           12/11/2020 22:18:53*  0.04   0.07   0.08   0.11   0.13   0.15     4   3.1  Gai

11P           19/11/2020 18:50:34  16.63  15.96  15.59  15.39  15.25  15.14   9.1  17.9  B96

11P           19/11/2020 18:50:34*  0.09   0.10   0.08   0.09   0.13   0.13     4   3.6  Gai

11P           20/11/2020 20:14:12  16.77  16.05  15.73  15.48  15.35  15.24   8.9  18.0  B96

11P           20/11/2020 20:14:12*  0.03   0.06   0.10   0.05   0.07   0.09     3   3.6  Gai

11P           04/12/2020 20:19:11  16.96  16.32  15.92  15.67  15.55  15.42   9.8  17.9  B96

11P           04/12/2020 20:19:11*  0.01   0.02   0.04   0.01   0.00   0.00     2   3.4  Gai

11P           15/12/2020 17:07:02  17.15  16.53  16.10  15.85  15.71  15.63   2.5  17.3  B96

11P           15/12/2020 17:07:02*  0.11   0.18   0.20   0.20   0.26   0.28     5   4.1  Gai

                                                                     AFRHO         LOG

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

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

11P           13/09/2020 23:29:21    0.67   1.60  41.14  18.12    3      1     0  -0.21  B96

11P           16/09/2020 22:12:26    0.65   1.58  42.39  17.11    4      1     0  0.167  B96

11P           18/09/2020 23:14:17    0.64   1.57  43.26  17.64    6      1     0  -0.07  B96

11P           20/09/2020 22:35:06    0.63   1.56  44.09  17.65    8      1     0  -0.10  B96

11P           21/09/2020 22:09:38    0.62   1.56  44.51  17.62    8      1     0  -0.10  B96

11P           02/11/2020 21:07:08    0.49   1.41  55.82  13.33    6     22     3  1.340  B96

11P           04/11/2020 21:10:51    0.49   1.41  55.80  15.32   11      3     0  0.538  B96

11P           06/11/2020 21:12:38    0.49   1.41  55.71  15.38    7      3     0  0.515  B96

11P           12/11/2020 22:18:53    0.50   1.40  55.06  15.35   11      3     0  0.530  B96

11P           19/11/2020 18:50:34    0.51   1.39  53.66  15.17    9      4     0  0.622  B96

11P           20/11/2020 20:14:12    0.52   1.39  53.38  15.28    9      4     0  0.585  B96

11P           04/12/2020 20:19:11    0.57   1.39  48.71  15.55   10      4     0  0.556  B96

11P           15/12/2020 17:07:02    0.62   1.41  44.25  15.82    3      3     1  0.540  B96

Ernst Wilhelm Liebrecht Tempel (Marseilles, France) discovered this comet on 1869 November 27 in Pegasus. The comet was already a week after perihelion. Shortly thereafter, observers were describing it as diffuse and circular, with a coma about 5 arc minutes across. The comet was only observed for 39 days and although recognised as a short-period comet, astronomers were uncertain as to the exact period. An attempt to find the comet in 1875 was unsuccessful.