Comet C/2019 Y4 (ATLAS) - 13 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 2020.04.14 13:52:31

NET Gaia DR2

CK19Y04a C2020 04 13.84424 06 33 07.14 +66 20 15.0 15.3 R B96

CK19Y04a C2020 04 13.84517 06 33 06.84 +66 20 13.9 15.4 R B96

CK19Y04a C2020 04 13.84611 06 33 06.49 +66 20 12.8 15.4 R B96

CK19Y04a C2020 04 13.84705 06 33 06.33 +66 20 11.6 15.3 R B96

CK19Y04a C2020 04 13.84809 06 33 06.06 +66 20 10.5 15.7 G B96

CK19Y04a C2020 04 13.84903 06 33 05.54 +66 20 09.5 15.8 G B96

CK19Y04a C2020 04 13.84995 06 33 05.19 +66 20 09.3 15.8 G B96

CK19Y04a C2020 04 13.85089 06 33 04.99 +66 20 08.3 15.9 G B96

CK19Y04a C2020 04 13.85183 06 33 04.81 +66 20 07.0 15.9 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 Y4a 13/04/2020 20:37:35 14.88 13.77 13.11 12.63 12.28 11.99 7.7 18.2 B96

C/2019 Y4a 13/04/2020 20:37:35* 0.06 0.07 0.07 0.06 0.06 0.06 29 3.6 Gai

AFRHO LOG

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

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

C/2019 Y4a 13/04/2020 20:37:35 1.00 1.23 27.51 13.25 8 74 10 1.868 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