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Astrometric data for minor planet center

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

     3I|           |        | CCD|B96 |2025-08-25T19:39:24Z   |236.21902  |-15.17773  |0.66 |0.69  |   Gaia3|15.4 |0.21  |  Gr|   R|   Gaia3| 5.6  |0.69  |4.0   | 120|0.38  |   317|     |

     3I|           |        | CCD|B96 |2025-08-25T19:51:21Z   |236.21397  |-15.17696  |0.30 |0.34  |   Gaia3|15.4 |0.10  |  Gr|   R|   Gaia3| 5.6  |1.21  |3.9   | 120|0.40  |   424|     |

     3I|           |        | CCD|B96 |2025-08-25T20:00:51Z   |236.20984  |-15.17614  |0.23 |0.36  |   Gaia3|15.1 |0.08  |  Gr|   R|   Gaia3| 5.6  |1.39  |4.2   | 120|0.42  |   404|     |

Comet 3I/ATLAS - 25 aug. 2025

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

http://cara.uai.it

Photometric data obtained from KOPR software

ICQ Code:

  3I       2025 08 25.82  k 15.2 AR 40.0L 3A200   0.4               ICQ XX BRY04I     C 0.40mST0 K6F KPR 0 U9*0.02       1.2s 1.2 ;B96 Observatory, Kruibeke, Belgium, Comet Alt.:17.4

CometObs format:

3I/ATLAS = C/2025 N1 (ATLAS):

2025  Aug.  25.82  UT: m1=15.2 CCD-R, Dia.=0.4', 40.0-cm Newtonian reflector .(Erik Bryssinck, BRIXIIS Observatory)

Afρ parameter according CARA approach

Afρ parameter according CARA approch - unfiltered ccd-images