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COMET C/2023 T2 (BORISOV)

Photometric data obtained from FOCAS-II software

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

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

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

C/2023 T2     16/01/2024 22:11:27  18.63  18.44  18.33                        3.9  17.6  B96

C/2023 T2     16/01/2024 22:11:27*  0.40   0.42   0.24                          3   3.2  Gai

                                                                     AFRHO         LOG

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

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

C/2023 T2     16/01/2024 22:11:27    1.48   2.02  18.60  18.46    4      4     1  0.551  B96

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

http://cara.uai.it

Comet C/2023 T2 (Borisov) (astro.vanbuitenen.nl)

Discovery:  [ CBET 5304:  COMET C/2023 T2 (Borisov) ]

Gennady Borisov reports his discovery of another comet on CCD images obtained on Oct. 14 with a 0.50-m f/1.9 astrograph at the MARGO observatory near Nauchnij, Crimea .  The object showed a diffuse coma of diameter about 4" with no tail; Borisov measured the total green magnitude of the comet to be 19.4 in a circular aperture of size 0'.5.  After the object was posted on the Minor Planet Center's PCCP webpage, other

CCD astrometrists confirmed the cometary appearance:

OC   Date        Reporter           Coma    Tail    PA          Exposures

L76  2023-10-14  E. Romas           5"

095  2023-10-14  V. Rumyantsev      8"       12"    230-260

J95  2023-10-14  P. Birtwhistle     6"       11"    125          80x10s

U94  2023-10-16  H. Sato            6"                           12x60s

G00  2023-10-16  M. Jaeger          9"       11"    114

204  2023-10-17  A. Aletti          6"                           62x30s

G00  2023-10-17  M. Jaeger          9"       11"    124          10x90s

W62  2023-10-19  J. Maikner        15"       25"    120          30x60s

H01  2023-10-19  B. Ryan            6"       18"     90-130

F51  2023-10-19  R. Weryk           0".7      5"    120           2x60s      

MPEC U162: COMET C/2023 T2 (Borisov)