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COMET 97P/METCALF-BREWINGTON  -  (=1906 V2=1991 A1)

97P on Cometography

Data obtained by use of  FOCAS-II software

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

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

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

97P           08/12/2021 20:31:42  18.86  18.52  18.16                        5.5  17.5  B96

97P           08/12/2021 20:31:42*  0.09   0.27   0.44                          2   4.0  Gai

                                                                     AFRHO         LOG

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

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

97P           08/12/2021 20:31:42    2.03   2.62  13.57  18.69    6      9     2  0.956  B96

Discovery:

The Reverend Joel Hastings Metcalf (Taunton, Massachusetts, USA) discovered this comet in Eridanus on a photograph exposed on 1906 November 15.11. He estimated the magnitude as 12, and described the comet as about 2 arc minutes across, with a distinct central condensation. The comet was extensively observed, but only until 1907 January 16. There was subsequently an uncertainty of several weeks in the orbital period and the comet was lost.

     Howard J. Brewington (near Cloudcroft, New Mexico, USA) was comet hunting on the night of 1991 January 7, when he found a diffuse object on January 7.18. He determined the total magnitude as 9.8 and said the object was strongly condensed. An independent discovery was made by William A. Bradfield on January 7.53, but it was reported too late to rename the comet. On January 9 the Central Bureau for Astronomical Telegrams announced that Brewington's comet was identical to the lost periodic comet Metcalf.