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Comet C/2021 T4 (LEMMON) - 3 may 2024

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

http://cara.uai.it

Af(rho) parameter according CARA-approach

Af(rho) parameter vs. core distance - data obtained from unfiltered CCD-image

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/2021 T4  |        | CCD|B96 |2024-05-03T22:02:02Z   |184.59309  |+22.76722  |0.22 |0.27  |   Gaia2|18.5 |0.07  |   G|   Gaia2| 5.6  |1.19  |3.5   | 0.1|0.25  |   120|     |

       |C/2021 T4  |        | CCD|B96 |2024-05-03T22:09:06Z   |184.59159  |+22.76760  |0.22 |0.27  |   Gaia2|18.5 |0.08  |   G|   Gaia2| 5.6  |1.12  |3.0   | 0.1|0.25  |   122|     |

       |C/2021 T4  |        | CCD|B96 |2024-05-03T22:16:09Z   |184.58959  |+22.76759  |0.24 |0.28  |   Gaia2|18.3 |0.06  |   G|   Gaia2| 5.6  |1.28  |2.8   | 0.1|0.26  |   120|     |

ICQ-format:

ICQ Code:

   2021T4  2024 05 03.92  C 17.5 AQ 40.0L 3a840   0.4               ICQ XX BRY04I     C 0.44mST0 K6F KPR 2 U7*0.01       1.2s 1.2 ;Comet Alt.:59.5 Calculated mags:17.5,17.5,17.5,17.5,17.5,17.5,17.5,17.5,17.6,17.5,17.5,17.5

CometObs format:

C/2021 T4 (Lemmon):

2024  May  03.92  UT: m1=17.5 CCD-C, Dia.=0.4', 40.0-cm Newtonian reflector .

[Comet Alt.:59.5 Calculated mags:17.5,17.5,17.5,17.5,17.5,17.5,17.5,17.5,17.6,17.5,17.5,17.5

] (Erik Bryssinck, BRIXIIS)