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Comet 408P/NOVICHONOK-GERKE - = 2011 R3 = 2020 M7

Photometric data obtained from FOCAS-II software

COD B96

OBS BRIXIIS Observatory

CATALOG: Gaia DR2 - BAND: G

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

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

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

408P          24/09/2021 21:19:45  18.10  18.17  18.26                        6.6  17.7  B96

408P          24/09/2021 21:19:45*  0.00   0.00   0.00                          1   3.9  Gai

408P          08/10/2021 20:56:30  18.09  17.93  17.88  17.85                 3.5  17.6  B96

408P          08/10/2021 20:56:30*  0.14   0.29   0.25   0.52                   3   3.8  Gai

408P          26/12/2022 19:53:59  16.89  16.36  16.17  16.06  16.05  16.04  13.0  17.6  B96

408P          26/12/2022 19:53:59*  0.00   0.07   0.02   0.00   0.12   0.11     2   3.9  Gai

                                                                     AFRHO         LOG

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

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

408P          24/09/2021 21:19:45    2.88   3.87   9.57  18.09    7     70    11  1.844  B96

408P          08/10/2021 20:56:30    2.91   3.85   9.48  18.09    4     70    20  1.846  B96

408P          26/12/2022 19:53:59    2.69   3.49  10.25  16.77   13    165    13  2.219  B96

Af(rho) data according the CARA-approach is available via request to CARA-coordinator

http://cara.uai.it

Discovery: (MPEC 2011-R34 )

MPEC 2011-R34 announced the discovery by Artyom Novichonok of a comet with the 0.4-m f/8 Ritchey-Chretien at Ka-Dar Observatory, TAU Station, Nizhny Arkhyz on images taken on 2011 September 7.02 by Vladimir Gerke. The comet has a period of 11 years with perihelion at 3.6 au in 2012 April.

Only the name Novichonok was originally given to the comet, however the discoverer was clear that it was a team effort with Gerke, and the name was later amended.

Recovery:

Syuichi Nakano found images of 2011 R3 in PanSTARRS 1 data taken with the 1.8m Ritchey-Chretien on 2020 June 20.49 and July 18.36. The comet was close to the expected position. The comet was put into its present orbit during a series of encounters with Jupiter: 0.87 au in 1992 October, 0.11 au in 1993 August and 0.45 au in 2005 April. Prior to these encounters the comet was in a more distant orbit with perihelion at 5.2 au and a period of 19.4 years. It was finally given a designation for the return in 2020 November - MPEC 2020-V78