Copyright © All rights reserved. Made By Erik Bryssinck  Terms of use  |  Privacy policy

Comet 186P/GARRADD

186P on Kronck’s cometography

Photometric data obtained from FOCAS-II software

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

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

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

186P          07/10/2021 22:13:07  20.33  19.82                               2.5  17.5  B96

186P          07/10/2021 22:13:07*  0.00   0.00                                 1   3.8  Gai

                                                                     AFRHO         LOG

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

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

Discovery:

G. J. Garradd (Siding Spring Observatory, New South Wales, Australia) discovered this comet on images obtained on 2007 January 25.70, January 25.72, and January 25.73, using the 0.5-m Uppsala Schmidt and a CCD camera. The three images indicated a magnitude of 18.0-18.3. In late February, M. Meyer (Germany) announced that he had found three prediscovery images on Siding Spring Observatory Digital Sky Survey images from 1975 and 1996. He had been slightly adjusting the early orbits that were calculated when he found an image of the comet on a plate exposed on 1996 February 26.64. The magnitude was given as 17.8. The orbit improvement brought about by this position then enabled Meyer to locate the comet on images exposed on 1975 May 31.38 and June 3.39. The magnitude on these images was given as 15.5. In linking all of these positions, G. V. Williams (Central Bureau for Astronomical Telegrams) found that comet images reported on IAU Circular No. 3247 (1978 Jul. 25) by R. D. Eberst also belonged to this comet. The images were also exposed at Siding Spring Observatory, using the 1.2-m UK Schmidt, on 1977 July 18.58 and July 19.61. The magnitude was given as 18, while a tail extended about 3'.

Orbital simulation by JPL