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COMET C/2023 E1 (ATLAS)

Photometric data obtained from FOCAS-II software

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

C/2023 E1     17/05/2023 23:12:26  16.76  15.84  15.24  14.81  14.52  14.29  12.8  18.3  B96

C/2023 E1     17/05/2023 23:12:26*  0.05   0.03   0.05   0.04   0.03   0.04     2   3.1  Gai

C/2023 E1     04/06/2023 21:20:13  15.74  14.73  14.13  13.72  13.43  13.20   9.9  16.7  B96

C/2023 E1     04/06/2023 21:20:13*  0.03   0.02   0.01   0.01   0.03   0.02     2   3.7  Gai

C/2023 E1     07/08/2023 22:22:54  14.88  13.86  13.25  12.81  12.48  12.22  15.3  17.7  B96

C/2023 E1     07/08/2023 22:22:54*  0.01   0.02   0.01   0.01   0.01   0.01     2   3.3  Gai

C/2023 E1     21/08/2023 21:10:42  14.86  14.01  13.50  13.13  12.82  12.60  23.4  18.0  B96

C/2023 E1     21/08/2023 21:10:42*  0.01   0.01   0.01   0.00   0.01   0.00     2   3.0  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

C/2023 E1     17/05/2023 23:12:26    0.77   1.25  35.87  14.99   13      9     1  0.953  B96

C/2023 E1     04/06/2023 21:20:13    0.75   1.11  36.76  13.87   10     19     2  1.280  B96

C/2023 E1     07/08/2023 22:22:54    0.40   1.20  68.98  12.01   15     35     2  1.540  B96

C/2023 E1     21/08/2023 21:10:42    0.38   1.32  72.80  12.36   23     27     1  1.438  B96

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

http://cara.uai.it

Comet C/2023 E1 (ATLAS) (astro.vanbuitenen.nl)

Discovery:  [ CBET 5233 : 20230312 : COMET C/2023 E1 (ATLAS) ]

     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

MPEC 2023-E59: COMET C/2023 E1 (ATLAS)