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Comet 110P/HARTLEY - (=1988 D1 = 1993 M1)

Comet 110P/HARTLEY - Kronk’s cometgraphy

Discovery:

 Malcolm Hartley discovered this comet on plates exposed on 1988 February 19 and 22 with the U.K. Schmidt Telescope Unit at Siding Spring. He estimated the total magnitude as 16.5 on the 19th. He added that the plate exposed on the 22nd revealed a tail extending 10 arc minutes towards the northwest.

     Following the announcement on February 23, Carolyn and Eugene Shoemaker found the comet on a plate exposed on the 19th, just a few hours prior to the earliest Siding Spring photo. The Shoemaker plate had been obtained with the 0.46-m Schmidt telescope at Palomar Observatory.

Photometric data obtained by use of FOCAS-II software

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

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

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

110P          31/12/2014 21:16:32  14.76  14.19  13.91  13.71  13.55  13.42  16.3  17.0  B96

110P          31/12/2014 21:16:32*  0.04   0.05   0.06   0.06   0.05   0.06    18   3.6  USN

110P          06/02/2015 21:18:20  16.02  15.37  15.01  14.82  14.71  14.67  12.6  17.8  B96

110P          06/02/2015 21:18:20*  0.03   0.07   0.09   0.09   0.11   0.12     8   3.7  USN

110P          04/03/2015 20:40:12  16.56  15.86  15.56  15.49  15.55          8.3  17.1  B96

110P          04/03/2015 20:40:12*  0.07   0.08   0.08   0.06   0.08            7   3.8  USN

110P          09/12/2021 00:16:09  16.24  15.66  15.39  15.26  15.26  15.23  12.3  17.6  B96

110P          09/12/2021 00:16:09*  0.03   0.04   0.09   0.05   0.04   0.08     2   3.5  Gai

110P          25/02/2022 21:46:50  17.18  16.42  16.01  15.70  15.51  15.38   7.4  18.1  B96

110P          25/02/2022 21:46:50*  0.10   0.17   0.11   0.07   0.04   0.06     3   3.9  Gai

110P          24/03/2022 20:34:21  17.98  17.59  17.43  17.41                 1.1  17.4  B96

110P          24/03/2022 20:34:21*  0.11   0.14   0.13   0.24                   2   3.9  Gai

COMET         UTC                   DELTA    R    APER    Mag   AfRho   +/-   Log   Obs

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

110P          31/12/2014 21:16:32    1.49   2.48  18.45  14.28   16    255    16  2.407  B96

110P          06/02/2015 21:18:20    1.68   2.50  16.40  15.57   13    101     8  2.002  B96

110P          04/03/2015 20:40:12    1.97   2.52  13.99  16.22    8     77     9  1.888  B96

110P          09/12/2021 00:16:09    1.74   2.48  15.86  15.87   12     80     6  1.903  B96

110P          25/02/2022 21:46:50    1.74   2.58  15.81  16.68    7     41     6  1.617  B96

110P          24/03/2022 20:34:21    2.06   2.64  13.36  17.82    1     21    19  1.326  B96