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COMET C/2021 A4 (NEOWISE)

Photometric data obtained from FOCAS-II software

OBS BRIXIIS Observatory

CATALOG: Gaia DR2 - BAND: G

                                   10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB   COD

COMET         UTC                    +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

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

C/2021 A4     26/02/2021 20:47:02  15.21  14.58  14.32  14.11  13.98  13.87  24.1  17.3  B96

C/2021 A4     26/02/2021 20:47:02*  0.01   0.02   0.03   0.05   0.05   0.06     2   3.3  Gai

C/2021 A4     02/03/2021 22:05:34  15.13  14.50  14.08  13.71  13.39  13.11  10.6  16.3  B96

C/2021 A4     02/03/2021 22:05:34*  0.09   0.12   0.14   0.23   0.28   0.32     5   3.3  Gai

                                                                     AFRHO         LOG

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

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

C/2021 A4     26/02/2021 20:47:02    0.63   1.19  43.99  14.06   24     13     1  1.107  B96

C/2021 A4     02/03/2021 22:05:34    0.72   1.18  38.27  13.71   11     23     2  1.355  B96

Af(rho) data according the CARA-approach is available via request to CARA-coordinator

http://cara.uai.it

Comet C/2021 A4 (NEOWISE) (astro.vanbuitenen.nl)

Discovery: CBET 4914

Jana P. Chesley, Jet Propulsion Laboratory, reports the discovery of an apparently 20th magnitude asteroidal object with interesting motion in infrared images obtained during 2021 Jan. 3 UT  with the Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE)