Comet C/2019 Y4 (ATLAS) - 19 april 2020

Astrometric data for minor planet center

COD B96

CON E. Bryssinck, BRIXIIS Observatory, 9150 Kruibeke , Belgium

OBS E. Bryssinck

MEA E. Bryssinck

TEL 0.4-m f/3.8 reflector + CCD

ACK MPCReport file updated 2020.04.20 12:22:06

NET Gaia DR2

CK19Y04b C2020 04 19.87122 06 03 28.05 +64 30 28.6 16.3 R B96

CK19Y04b C2020 04 19.87775 06 03 26.38 +64 30 21.4 16.1 R B96

CK19Y04b C2020 04 19.89000 06 03 23.03 +64 30 03.9 16.7 G B96

CK19Y04a C2020 04 19.92551 06 03 13.47 +64 29 21.0 16.7 G B96

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

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/2019 Y4b 19/04/2020 21:33:35 15.40 14.14 13.44 12.94 12.57 12.29 4.8 17.9 B96

C/2019 Y4b 19/04/2020 21:33:35* 0.05 0.05 0.05 0.05 0.05 0.04 12 3.3 Gai

AFRHO LOG

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

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

C/2019 Y4b 19/04/2020 21:33:35 0.98 1.11 28.16 13.57 5 43 9 1.629 B96

FoCAs 3.66

www.astrosurf.com/cometas-obs

es.groups.yahoo.com/group/Cometas_Obs

Afρ parameter according CARA-Approach

Afρ [cm] vs. core distance (in km) - image with Bessel R filter