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Comet C/2023 E1 (ATLAS) - 10 march 2023

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

http://cara.uai.it

Astrometric data for minor planet center

COD X02

CON E. Bryssinck, Kruibeke, Belgium

OBS E. Bryssinck, M. Rocchetto, E. Guido

OBS G. Milani, A. Valvasori

MEA E. Bryssinck

TEL 0.61-m f/6.7 reflector + CCD

ACK NEOCP X02 file updated 2023.03.10 10:14:10

AC2 erik.bryssinck@telenet.be

NET UCAC-4

     A10TcmV KC2023 03 10.33843 12 50 23.40 +15 15 16.6          18.5 G      X02

     A10TcmV KC2023 03 10.34883 12 50 23.27 +15 15 38.6          18.2 G      X02

----- end -----

COD X02

OBS Telescope.Live

CATALOG: Gaia DR2 - BAND: G

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

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

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

C/2023 A3     01/03/2023 07:07:30  18.04  17.95  18.03  18.08  18.08          8.3  20.1  X02

C/2023 A3     01/03/2023 07:07:30*  0.02   0.00   0.01   0.08   0.19            3   1.3  Gai

                                                                     AFRHO         LOG

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

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

C/2023 A3     01/03/2023 07:07:30    6.84   7.25   4.03  17.96    8   1545   186  3.189  X02

Photometry obtained with FOCAS-II software:

     A. Aletti reports cometary activity of an asteroidal NEOCP candidate (initially found in the isolated tracklet file by P. Veres, starting with an ATLAS South Africa - M22 tracklet observed on Mar. 1 UT and subsequently linked tracklets back to Dec. 2022, showing a highly eccentric orbit) in follow-up images noting a very condensed 6" coma. Additional reports of cometary features are as follows:

OC   Date        Reporter           Coma    Tail    PA          Exposures

P87  2023-03-05  K. Yoshimoto      22"                           20x90s

G18  2023-03-04  A. Valvasori       5"                           90x60s

X02  2023-03-10  E. Bryssinck       5".5                         20x60s