Comet C/2019 Y4 (ATLAS) - 10 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 2020.04.11 15:52:31

NET Gaia DR2

CK19Y04c C2020 04 10.83663 06 49 54.35 +67 05 20.6 14.9 R B96

CK19Y04c C2020 04 10.84889 06 49 49.91 +67 05 10.5 15.5 G B96

CK19Y04c C2020 04 10.87130 06 49 42.06 +67 04 50.9 15.5 G B96

CK19Y04c C2020 04 10.88998 06 49 35.55 +67 04 35.1 15.4 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 Y4c 10/04/2020 20:43:54 14.54 13.31 12.70 12.30 11.99 11.75 7.4 18.2 B96

C/2019 Y4c 10/04/2020 20:43:54* 0.02 0.05 0.05 0.04 0.03 0.03 15 3.1 Gai

AFRHO LOG

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

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

C/2019 Y4c 10/04/2020 20:43:54 1.01 1.29 27.22 12.91 7 112 15 2.050 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