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Comet 84P/GICLAS

84P on Kronck’s cometography

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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84P           05/03/2021 23:38:12  19.73  19.81                               3.8  18.4  B96

84P           05/03/2021 23:38:12*  0.00   0.00                                 1   3.3  Gai

                                                                     AFRHO         LOG

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

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Discovery:

 Henry L. Giclas (Lowell Observatory, Arizona, USA) discovered this comet in Cetus on 1978 September 8.30. He determined the magnitude as 15.6, and described it as diffuse, with a condensation and a possible elongation toward the west. Giclas subsequently found a prediscovery image on a plate exposed on September 3.33.

Recovery:

Edgar Everhart (Chamberlin Observatory field station, Colorado, USA) recovered the comet on an exposure obtained by John Briggs with the 0.4-m reflector on 1985 June 22.39. The recovery went unconfirmed until an independent recovery was made by C. Y. Shao (Oak Ridge Observatory) on an exposure obtained by G. Schwartz on July 18.30.