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COMET C/2025 K1 (ATLAS)

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

http://cara.uai.it

Comet C/2025 K1 (ATLAS) (astro.vanbuitenen.nl)

Discovery:   CBET 5557:  COMET C/2025 K1 (ATLAS)

An apparently asteroidal object discovered on CCD images taken on May 24 UT with a 0.5-m f/2 Schmidt reflector at Rio Hurtado, Chile, in the course of the "Asteroid Terrestrial-Impact Last Alert System" (ATLAS) search program has been found to show cometary appearance by CCD astrometrists elsewhere following posting to the Minor Planet Center's NEOCP and PCCP webpages.

     There were 9 reports of cometary activity.  The first report was by A. Hale.  There were 9 reports of a coma and there were 4 reports of a tail.  Details are provided in the table below.

OC   Date        Reporter            Coma    Tail   PA   Comet     Date

                                                        (T/P)   Reported

I41  2025-05-19  Q.-Z. Ye            2"        8"  260    T   2025-05-26.99

L09  2025-05-25  A. Hale             6"                   P   2025-05-25.17

U69  2025-05-25  M. Mattiazzo        8"                   T   2025-05-26.41

T14  2025-05-26  R. Weryk            0".7     11"  255    T   2025-05-26.63

L81  2025-05-26  J. Camarasa         8".6                 T   2025-05-26.54

Z17  2025-05-26  A. Hale             5"                   T   2025-05-26.18

V21  2025-05-26  D. T. Durig         6"       10"  270    T   2025-05-26.56

W62  2025-05-27  J. Maikner         10"                   T   2025-05-27.30

U94  2025-05-27  K. Yoshimoto       15"        8"  260    T   2025-05-27.49

MPEC 2025-K110: COMET C/2025 K1 (ATLAS)