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124P/MRKOS

Photometric data obtained by use of FOCAS-II software

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

COMET         UTC                    +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

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

124P          29/03/2014 22:27:36  15.71  15.35  15.31  15.39                12.6  16.7  B96

124P          29/03/2014 22:27:36*  0.08   0.08   0.09   0.13                   3   4.1  USN

124P          08/04/2014 20:24:19  16.70  16.34  16.15  16.02  16.01  15.96  12.3  17.2  B96

124P          08/04/2014 20:24:19*  0.02   0.04   0.05   0.10   0.15   0.18     5   3.7  USN

124P          15/04/2014 22:23:38  16.57  16.12  15.92                        5.5  15.9  B96

124P          15/04/2014 22:23:38*  0.16   0.23   0.28                          7   3.8  CMC

124P          15/01/2020 23:20:18  18.30  18.04  17.93                        5.5  17.6  B96

124P          15/01/2020 23:20:18*  0.10   0.20   0.09                          2   3.6  Gai

124P          19/01/2020 23:05:08  18.14  17.96  17.95                        6.9  17.5  B96

124P          19/01/2020 23:05:08*  0.25   0.11   0.05                          3   3.8  Gai

124P          17/03/2020 21:37:39  16.91  16.65  16.60  16.57  16.60  16.62  22.7  18.4  B96

124P          17/03/2020 21:37:39*  0.01   0.01   0.10   0.22   0.25   0.25     3   3.7  Gai

124P          21/03/2020 22:30:14  16.87  16.54  16.39  16.31  16.32  16.37  23.1  18.5  B96

124P          21/03/2020 22:30:14*  0.13   0.29   0.33   0.35   0.39   0.40     3   3.5  Gai

124P          22/03/2020 22:14:53  16.97  16.73  16.57  16.48  16.45  16.45  25.9  18.6  B96

124P          22/03/2020 22:14:53*  0.02   0.08   0.13   0.17   0.25   0.28     5   3.4  Gai

124P          23/03/2020 21:55:18  17.00  16.88  16.73  16.70                27.3  18.4  B96

124P          23/03/2020 21:55:18*  0.05   0.14   0.18   0.16                   2   3.4  Gai

124P          14/04/2020 22:01:02  17.42  17.04  16.90  16.71  16.58  16.46  13.5  18.2  B96

124P          14/04/2020 22:01:02*  0.03   0.10   0.19   0.24   0.29   0.37     3   3.9  Gai

                                                                     AFRHO         LOG

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

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

124P          29/03/2014 22:27:36    0.69   1.65  39.84  15.29   13     10     1  0.981  B96

124P          08/04/2014 20:24:19    0.73   1.65  37.66  16.10   12      5     0  0.704  B96

124P          15/04/2014 22:23:38    0.77   1.65  35.59  15.80    6      7     1  0.874  B96

124P          15/01/2020 23:20:18    1.17   1.90  23.58  18.00    6      3     1  0.475  B96

124P          19/01/2020 23:05:08    1.13   1.88  24.48  17.96    7      3     0  0.450  B96

124P          17/03/2020 21:37:39    0.79   1.69  35.10  16.63   23      4     0  0.576  B96

124P          21/03/2020 22:30:14    0.79   1.68  34.92  16.42   23      5     0  0.661  B96

124P          22/03/2020 22:14:53    0.79   1.68  34.85  16.56   26      4     0  0.606  B96

124P          23/03/2020 21:55:18    0.79   1.68  34.77  16.72   27      3     0  0.542  B96

124P          14/04/2020 22:01:02    0.89   1.65  31.02  16.83   14      4     0  0.583  B96

124P on Gary W. Kronk’s cometography

Antonin Mrkos (Klet Observatory) reported the discovery of a fast-moving object to the Central Bureau for Astronomical Telegrams on 1991 March 17. Films taken at Palomar by E. Helin et al. show the object to be somewhat diffuse. The object had appeared on photographic plates exposed on March 16.96 and March 17.04, but it was not certain whether this was a minor planet or a comet. He estimated the magnitude as 15. Following the announcement, Mrkos confirmed his find on March 17.98 and March 18.03, but noted the object was diffuse, with a central condensation, thus, establishing the cometary nature. The magnitude was again estimated as 15. Before Mrkos' confirmation had arrived, astronomers at Palomar Observatory in California independently confirmed the object with the 0.46-m Schmidt telescope. They also also noted it was somewhat diffuse, and gave the total magnitude as 14.0. Comet was assigned as MRKOS 1991 F1 (1991k) by IAUC 5212 issued on 1991 March 19 by D.W.E. Green.

The comet's recovery was announced during 1995 October. C. W. Hergenrother (Lunar and Planetary Laboratory, Arizona, USA)  found the comet on CCD images obtained by S. Larson on September 20.42. The nuclear magnitude (red light) was then between 21.7 and 22.3. .

W. Offutt (Cloudcroft, New Mexico) has confirmed this comet as well.  Recovery was assigned as MRKOS 1995 S3 (IAUC 6250) .

Last updated: 2020-10-20