Comet C/2020 H6 (ATLAS)

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Observation date	image	Photometry (FOCAS)	Afρ	astrometry	Observatory
20210606	X			X	B96 - BRIXIIS
20210607	X	X	X	X	B96 - BRIXIIS
20210612	X	X	X	X	B96 - BRIXIIS
20220328	X	X	X	X	B96 - BRIXIIS
20220420	X	X	X	X	B96 - BRIXIIS
20220428	X	X	X	X	B96 - BRIXIIS
20220601	X	X	X	X	B96 - BRIXIIS
20220704	X	X	X	X	B96 - BRIXIIS
20221002	X	X	X	X	B96 - BRIXIIS
20221018	X	X		X	B96 - BRIXIIS
20221113	X	X		X	B96 - BRIXIIS

Comet C/2020 H6 (ATLAS)

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

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

C/2020 H6 12/06/2021 22:07:21 16.59 15.68 15.51 7.2 17.2 B96

C/2020 H6 12/06/2021 22:07:21* 0.23 0.59 0.51 3 3.3 Gai

C/2020 H6 28/03/2022 01:04:28 16.61 16.10 15.89 15.89 15.91 15.98 11.2 17.6 B96

C/2020 H6 28/03/2022 01:04:28* 0.02 0.00 0.03 0.05 0.08 0.18 2 4.0 Gai

C/2020 H6 20/04/2022 23:58:55 16.55 16.08 15.91 15.83 15.81 13.2 18.1 B96

C/2020 H6 20/04/2022 23:58:55* 0.01 0.03 0.08 0.06 0.04 2 4.0 Gai

C/2020 H6 28/04/2022 00:13:55 16.61 16.12 15.98 15.93 15.96 14.8 18.0 B96

C/2020 H6 28/04/2022 00:13:55* 0.03 0.02 0.04 0.00 0.00 2 3.9 Gai

C/2020 H6 01/06/2022 22:50:58 16.67 16.13 15.89 15.82 15.81 15.82 14.6 18.6 B96

C/2020 H6 01/06/2022 22:50:58* 0.01 0.02 0.02 0.01 0.06 0.05 2 4.0 Gai

C/2020 H6 27/06/2022 22:43:23 16.82 16.52 16.44 10.3 17.0 B96

C/2020 H6 27/06/2022 22:43:23* 0.02 0.20 0.27 2 3.2 Gai

C/2020 H6 04/07/2022 21:46:55 16.79 16.25 16.05 16.00 16.08 16.13 14.7 18.0 B96

C/2020 H6 04/07/2022 21:46:55* 0.02 0.05 0.04 0.02 0.02 0.02 2 3.4 Gai

C/2020 H6 02/10/2022 18:59:32 17.29 16.75 16.57 16.50 10.7 18.0 B96

C/2020 H6 02/10/2022 18:59:32* 0.11 0.05 0.00 0.04 2 3.3 Gai

C/2020 H6 18/10/2022 18:33:54 17.31 16.74 16.57 16.43 7.3 17.8 B96

C/2020 H6 18/10/2022 18:33:54* 0.11 0.04 0.02 0.02 2 3.5 Gai

C/2020 H6 13/11/2022 17:52:55 17.57 16.98 16.84 16.84 6.6 17.8 B96

C/2020 H6 13/11/2022 17:52:55* 0.06 0.04 0.05 0.10 2 3.8 Gai

AFRHO LOG

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

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

C/2020 H6 07/06/2021 21:36:34 4.10 4.79 6.72 16.92 8 636 81 2.804 B96

C/2020 H6 12/06/2021 22:07:21 4.17 4.78 6.62 16.96 7 631 88 2.800 B96

C/2020 H6 28/03/2022 01:04:28 4.40 4.91 6.27 16.63 11 994 89 2.997 B96

C/2020 H6 20/04/2022 23:58:55 4.35 4.97 6.34 16.70 13 939 71 2.973 B96

C/2020 H6 28/04/2022 00:13:55 4.36 4.98 6.32 16.71 15 940 63 2.973 B96

C/2020 H6 01/06/2022 22:50:58 4.58 5.08 6.03 16.80 15 991 68 2.996 B96

C/2020 H6 27/06/2022 22:43:23 4.85 5.16 5.68 17.01 10 949 92 2.977 B96

C/2020 H6 04/07/2022 21:46:55 4.93 5.18 5.59 16.86 15 1138 77 3.056 B96

C/2020 H6 02/10/2022 18:59:32 5.90 5.51 4.67 17.68 11 857 80 2.933 B96

C/2020 H6 18/10/2022 18:33:54 6.01 5.57 4.59 17.76 7 847 116 2.928 B96

C/2020 H6 13/11/2022 17:52:55 6.13 5.68 4.50 17.93 7 784 119 2.894 B96

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

http://cara.uai.it

CBET 4768: COMET C/2020 H6

Discovery:

This comet was discovered by Alan Fitzsimmons and James Robinson, Queens University, Belfast on individual images from taken on Apr. 22 UT with a 0.5-m f/2 Schmidt reflector at Haleakala, Hawaii, in the course of the "Asteroid Terrestrial-Impact Last Alert System" (ATLAS) search program. The comet is at perihelion at 4.7 au in 2021 October.

See MPEC 2020-J23