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132P/Helin-Roman-Alu (1989y)

Photometric data obtained by use of FOCAS-II software

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

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

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132P          05/09/2021 22:04:20  16.07  15.72  15.48  15.55  15.59  15.67   8.9  16.6  B96

132P          05/09/2021 22:04:20*  0.06   0.12   0.05   0.10   0.20   0.31     3   3.8  Gai

132P          15/09/2021 22:01:53  15.50  15.11  14.89  14.82  14.79  14.82  17.9  17.5  B96

132P          15/09/2021 22:01:53*  0.02   0.05   0.07   0.04   0.07   0.09     3   4.0  Gai

132P          24/10/2021 21:11:38  14.68  14.08  13.88  13.77  13.71  13.68  19.9  17.4  B96

132P          24/10/2021 21:11:38*  0.03   0.12   0.12   0.13   0.14   0.13     3   3.5  Gai

132P          27/10/2021 22:51:33  14.78  14.25  14.06  13.95  13.87  13.81  26.6  17.9  B96

132P          27/10/2021 22:51:33*  0.01   0.02   0.03   0.02   0.02   0.01     3   3.9  Gai

132P          08/11/2021 20:49:12  14.97  14.43  14.23  14.09  14.03  13.99  26.6  17.4  B96

132P          08/11/2021 20:49:12*  0.01   0.03   0.05   0.05   0.07   0.08     3   3.8  Gai

132P          08/12/2021 20:07:50  15.70  15.12  14.87  14.72  14.63  14.55  17.4  17.6  B96

132P          08/12/2021 20:07:50*  0.04   0.10   0.13   0.17   0.23   0.27     3   4.0  Gai

132P          24/01/2022 19:00:12  16.06  15.35  15.04  14.89  14.80  14.75   8.3  17.7  B96

132P          24/01/2022 19:00:12*  0.03   0.06   0.07   0.02   0.05   0.07     3   3.3  Gai

132P          11/02/2022 19:32:50  17.11  16.50  16.17  16.06  16.00          6.3  17.5  B96

132P          11/02/2022 19:32:50*  0.04   0.12   0.18   0.26   0.25            2   3.9  Gai

                                                                     AFRHO         LOG

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

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132P          05/09/2021 22:04:20    0.85   1.82  32.44  15.66    9     13     1  1.097  B96

132P          15/09/2021 22:01:53    0.79   1.79  34.77  14.93   18     21     1  1.314  B96

132P          24/10/2021 21:11:38    0.76   1.70  36.32  13.86   20     46     2  1.662  B96

132P          27/10/2021 22:51:33    0.77   1.70  35.88  14.02   27     40     2  1.605  B96

132P          08/11/2021 20:49:12    0.82   1.69  33.68  14.23   27     38     1  1.576  B96

132P          08/12/2021 20:07:50    1.03   1.71  26.90  15.00   17     30     2  1.471  B96

132P          24/01/2022 19:00:12    1.52   1.84  18.15  15.52    8     47     6  1.668  B96

132P          11/02/2022 19:32:50    1.75   1.91  15.73  16.73    6     22     3  1.341  B96

132P on Kronk’s cometography

Comet 132P/Helin-Roman-Alu (astro.vanbuitenen)

Discovery:

Eleanor F. Helin reports the discovery by Jeff Alu and herself, using the Palomar 0.46-m Schmidt telescope, of another comet on 1989 oct. 26 . The object is slightly diffuse with a very faint tail toward the west with magnitude about 16.   B. Roman and K. Lawrence assisted with the observations. the comet was preleminary assigned as comet 1989y via IAU Circ., No. 4886 issued on 1989 oct. 30.

Recovery:

The comet was expected to return to perihelion during 1997. It was recovered by C. W. Hergenrother using the Smithsonian Astrophysical Observatory's 1.2-m reflector on Mt. Hopkins on 1997 July 13.46. The image showed a slight diffuseness. Further images on July 14 confirmed this was the comet and the nuclear magnitude was determined as 19.6. A short tail was also visible in PA 250 degrees. The precise positions indicated the prediction by B. G. Marsden (Central Bureau for Astronomical Telegrams) required a correction of -0.6 day. The comet passed perihelion on 1997 November 10. It did not exceed a brightness of magnitude 17.