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Comet C/2021 T4 (LEMMON) - 12 dec. 2022

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

http://cara.uai.it

Astrometric data for minor planet center

COD B96

CON E. Bryssinck, BRIXIIS Observatory, 9150 Kruibeke , Belgium

OBS E. Bryssinck

MEA E. Bryssinck

TEL 0.4-m f/3.8 reflector + CCD

ACK MPCReport file updated 2022.12.13 17:01:06

NET Gaia DR2

    CK21T040  C2022 12 12.77891 00 58 24.83 -13 07 51.5          16.4 G      B96

    CK21T040  C2022 12 12.78566 00 58 24.26 -13 07 53.0          16.5 G      B96

    CK21T040  C2022 12 12.79258 00 58 23.73 -13 07 55.3          16.4 G      B96

----- end -----

COD Z08

OBS BRIXIIS Observatory

CATALOG: Gaia DR2 - BAND: G

                                   10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB   COD

COMET         UTC                    +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

------------  -------------------  -----  -----  -----  -----  -----  -----  ----  ----  ---

C/2021 T4     12/12/2022 18:41:38  16.17  15.61  15.37  15.24  15.15  15.04  10.4  17.1  B96

C/2021 T4     12/12/2022 18:41:38*  0.00   0.00   0.00   0.00   0.00   0.00     1   3.9  Gai

                                                                     AFRHO         LOG

COMET         UTC                   DELTA    r    BOX "   MAG   RSR    CM    +/-  AFRHO  OBS

------------  -------------------   -----  -----  -----  -----  ---  -----  ----  -----  ---

C/2021 T4     12/12/2022 18:41:38    2.87   3.29   9.61  16.13   10    303    29  2.481  B96

Photometry obtained with FOCAS-II software:

Af(rho) parameter according CARA-approach

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