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44P/REINMUTH

44P on 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

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

44P           07/08/2015 01:16:41  17.70  17.57  17.37                        2.9  16.1  B96

44P           07/08/2015 01:16:41*  0.45   0.57   0.76                          4   3.7  USN

44P           23/08/2015 01:54:56  18.07  17.59  17.43  17.27  17.13  17.04   2.6  17.2  B96

44P           23/08/2015 01:54:56*  0.22   0.24   0.39   0.72   0.73   0.74     4   3.8  USN

44P           13/11/2015 21:22:17  16.79  16.21  15.90  15.56  15.09          4.8  17.1  B96

44P           13/11/2015 21:22:17*  0.08   0.08   0.17   0.25   0.33            5   3.9  USN

44P           31/12/2015 19:09:50  17.63  16.96  16.60  16.36  16.20  16.13   7.6  17.6  B96

44P           31/12/2015 19:09:50*  0.11   0.18   0.07   0.20   0.40   0.45     2   3.9  USN

44P           13/11/2022 21:26:07  17.21  16.58  16.25  16.09  15.96  15.98  10.5  18.0  B96

44P           13/11/2022 21:26:07*  0.01   0.03   0.03   0.00   0.01   0.01     2   3.8  Gai

44P           25/11/2022 22:09:15  17.27  16.70  16.41  16.25  16.19  16.20  10.4  18.1  B96

44P           25/11/2022 22:09:15*  0.18   0.15   0.14   0.17   0.22   0.32     5   3.6  Gai

                                                                     AFRHO         LOG

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

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

44P           07/08/2015 01:16:41    2.38   2.35  11.58  17.68    3     26     9  1.409  B96

44P           23/08/2015 01:54:56    2.24   2.41  12.29  17.92    3     19     7  1.278  B96

44P           13/11/2015 21:22:17    1.75   2.72  15.74  16.41    5     59    12  1.774  B96

44P           31/12/2015 19:09:50    2.12   2.92  13.01  17.36    8     42     6  1.622  B96

44P           13/11/2022 21:26:07    1.61   2.60  17.09  16.75   11     34     3  1.529  B96

44P           25/11/2022 22:09:15    1.68   2.64  16.44  16.88   10     34     3  1.526  B96

During the course of a routine photographic survey of minor planets with the 40-cm Bruce photographic telescope, Karl Reinmuth (Königstuhl Observatory, Heidelberg, Germany) discovered this comet on 1947 September 10.91. He estimated the magnitude as 13.

Apparition of 1947: The comet was nearly one month passed perihelion when discovered and was less than one day from its closest approach to Earth. Although it should have been slowly fading in the weeks that followed, the comet changed little in brightness during the first month of visibility and did not actually start fading until after mid-October of 1947. The comet was slightly brighter than magnitude 14 at the beginning of November and was near 15 as December began. The comet followed until 1948 February 1, when Hamilton Moore Jeffers and B. J. Mattson (Lick Observatory, California, USA) photographed the comet with the 36-inch f/5.8 Crossley reflector. They determined the magnitude as 17.7.