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Comet C/2025 K1 (ATLAS) - 10 aug. 2025

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

http://cara.uai.it

Astrometric data for minor planet center (ADES format)

permID |provID     |trkSub  |mode|stn |obsTime                |ra         |dec        |rmsRA|rmsDec|astCat  |mag  |rmsMag|band|photCat |photAp|logSNR|seeing|exp |rmsFit|nStars|notes|remarks

       |C/2025 K1  |        | CCD|B96 |2025-08-10T21:53:00Z   |269.98928  |+17.12128  |0.24 |0.32  |   Gaia3|13.9 |0.08  |  Gr|   R|   Gaia3| 5.6  |1.77  |2.6   |  30|0.37  |  1245|     |

       |C/2025 K1  |        | CCD|B96 |2025-08-10T22:00:42Z   |269.97399  |+17.11602  |0.22 |0.32  |   Gaia3|13.9 |0.08  |  Gr|   R|   Gaia3| 5.6  |1.79  |2.7   |  30|0.38  |  1581|     |

       |C/2025 K1  |        | CCD|B96 |2025-08-10T22:09:15Z   |269.95707  |+17.11011  |0.23 |0.34  |   Gaia3|13.9 |0.08  |  Gr|   R|   Gaia3| 5.6  |1.74  |2.8   |  30|0.40  |  1601|     |

       |C/2025 K1  |        | CCD|B96 |2025-08-10T22:17:48Z   |269.94022  |+17.10417  |0.23 |0.34  |   Gaia3|13.9 |0.08  |  Gr|   R|   Gaia3| 5.6  |1.76  |2.7   |  30|0.39  |  1507|     |

       |C/2025 K1  |        | CCD|B96 |2025-08-10T22:26:37Z   |269.92281  |+17.09808  |0.23 |0.33  |   Gaia3|13.9 |0.08  |  Gr|   R|   Gaia3| 5.6  |1.77  |3.2   |  30|0.38  |  1458|     |

Af(rho) parameter according CARA-approach

Af(rho) [cm] vs. core distance [km] - data obtained from R-filtered CCD-image

ICQ-format - photometry:

ICQ Code:

   2025K1  2025 08 10.91  k 12.8 AR 40.0L 3A200   1.0       5.8m116 ICQ XX BRY04I     C 1.04mST0 K6F KPR 0 U9*0.02       1.2s 1.2 ;Comet Alt.:51.9

CometObs format:

C/2025 K1 (ATLAS):

2025  Aug.  10.91  UT: m1=12.8 CCD-R, Dia.=1.0', 40.0-cm Newtonian reflector , Tail: 5.8 min. in p.a. 116 deg.(Erik Bryssinck, BRIXIIS Observatory)