Comet C/2019 Y4 (ATLAS) - 11 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 2020.04.12 13:52:31

NET Gaia DR2

CK19Y04c C2020 04 11.84519 06 44 07.72 +66 51 00.9 15.0 R B96

CK19Y04c C2020 04 11.84904 06 44 06.51 +66 50 57.2 15.6 G B96

CK19Y04c C2020 04 11.85277 06 44 05.16 +66 50 53.7 15.7 G B96

CK19Y04c C2020 04 11.85650 06 44 03.87 +66 50 51.3 15.7 G B96

CK19Y04c C2020 04 11.86024 06 44 02.58 +66 50 47.5 15.5 G B96

CK19Y04c C2020 04 11.86398 06 44 01.50 +66 50 43.7 15.7 G B96

CK19Y04c C2020 04 11.86772 06 44 00.14 +66 50 40.7 15.6 G B96

CK19Y04c C2020 04 11.87052 06 43 59.28 +66 50 37.9 15.7 G B96

CK19Y04c C2020 04 11.87519 06 43 57.47 +66 50 34.0 15.6 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 11/04/2020 20:41:16 14.54 13.30 12.67 12.26 11.95 11.71 6.5 18.1 B96

C/2019 Y4c 11/04/2020 20:41:16* 0.02 0.04 0.04 0.03 0.03 0.03 8 3.5 Gai

AFRHO LOG

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

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

C/2019 Y4c 11/04/2020 20:41:16 1.01 1.27 27.32 12.88 7 111 17 2.046 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