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Comet C/2023 C2 (ATLAS) - 5 sept. 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|fltr|photCat |photAp|logSNR|seeing|exp |rmsFit|nStars|notes|remarks

       |C/2023 C2  |        | CCD|B96 |2025-09-05T21:05:32Z   |344.92560  |+58.46396  |0.31 |0.38  |   Gaia3|15.7 |0.08  |  Gr|   R|   Gaia3| 5.6  |1.59  |3.4   | 120|0.40  |  6026|     |

       |C/2023 C2  |        | CCD|B96 |2025-09-05T21:14:57Z   |344.92367  |+58.46427  |0.25 |0.35  |   Gaia3|15.6 |0.08  |  Gr|   R|   Gaia3| 5.6  |1.54  |3.0   | 120|0.40  |  6149|     |

       |C/2023 C2  |        | CCD|B96 |2025-09-05T21:24:21Z   |344.92153  |+58.46458  |0.31 |0.38  |   Gaia3|15.7 |0.09  |  Gr|   R|   Gaia3| 5.6  |1.41  |3.0   | 120|0.40  |  6028|     |

Photometric data obtained by use of KPR software:

ICQ Code:

   2023C2  2025 09 05.88  k 15.3 AR 40.0L 3A080   0.5               ICQ XX BRY04I     C 0.48mST0 K6F KPR 0 U9*0.02       1.2s 1.2 ;Comet Alt.:66.4

CometObs format:

C/2023 C2 (ATLAS):

2025  Sep.  05.88  UT: m1=15.3 CCD-R, Dia.=0.5', 40.0-cm Newtonian reflector .(Erik Bryssinck, BRIXIIS Observatory)

Af(rho) data according CARA approach

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