Comet C/2019 Y4 (ATLAS) - 22 march 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 2020.03.23 18:21:54

NET Gaia DR2

CK19Y040 C2020 03 22.87456 09 02 13.22 +67 53 34.7 13.4 G B96

CK19Y040 C2020 03 22.87945 09 02 11.08 +67 53 37.6 13.4 G B96

CK19Y040 C2020 03 22.88433 09 02 08.93 +67 53 40.9 13.4 G B96

CK19Y040 C2020 03 22.89083 09 02 06.00 +67 53 45.5 13.4 G B96

CK19Y040 C2020 03 22.89735 09 02 03.05 +67 53 50.0 13.4 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 Y4 22/03/2020 21:18:07 13.04 12.27 11.86 11.58 11.37 11.21 35.0 18.5 B96

C/2019 Y4 22/03/2020 21:18:07* 0.02 0.02 0.02 0.02 0.02 0.02 13 3.6 Gai

AFRHO LOG

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

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

C/2019 Y4 22/03/2020 21:18:07 1.08 1.64 25.55 12.05 35 454 13 2.657 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