Comet C/2019 Y4 (ATLAS) - 15 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 2020.04.16 16:52:31

NET Gaia DR2

CK19Y04b C2020 04 15.86966 06 22 36.77 +65 46 01.4 15.3 R B96

CK19Y04b C2020 04 15.87725 06 22 34.75 +65 45 54.3 16.3 G B96

CK19Y04b C2020 04 15.89499 06 22 28.98 +65 45 33.6 15.9 G B96

CK19Y04b C2020 04 15.90346 06 22 26.49 +65 45 24.2 16.0 G B96

CK19Y04a C2020 04 15.92868 06 22 18.73 +65 44 57.8 16.0 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 15/04/2020 21:37:34 14.95 13.81 13.17 12.70 12.34 12.06 6.1 18.1 B96

C/2019 Y4b 15/04/2020 21:37:34* 0.03 0.01 0.00 0.01 0.01 0.01 4 3.6 Gai

AFRHO LOG

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

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

C/2019 Y4b 15/04/2020 21:37:34 1.00 1.19 27.71 13.30 6 65 11 1.813 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