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Comet C/2021 S4 (TSUCHINSHAN) - 10 jan. 2024

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 2024.01.11 17:52:57

NET Gaia DR2

    CK21S040  C2024 01 10.86576 04 33 52.75 +41 11 43.6          18.0 G      B96

    CK21S040  C2024 01 10.87068 04 33 52.72 +41 11 43.8          17.6 G      B96

    CK21S040  C2024 01 10.87232 04 33 52.64 +41 11 43.4          17.7 G      B96

    CK21S040  C2024 01 10.87559 04 33 52.63 +41 11 43.5          18.2 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 S4     10/01/2024 20:54:22*  0.12   0.14   0.17                          4   3.5  Gai

C/2022 E2     10/01/2024 23:24:54  14.49  13.73  13.45  13.32  13.25  13.21  25.0  17.9  B96

                                                                     AFRHO         LOG

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

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

C/2021 S4     10/01/2024 20:54:22    5.91   6.69   4.66  17.84    9   1097   123  3.040  B96

Photometry obtained with FOCAS-II software:

 Image taken on 4 oct with my 0.4-m f/3.8 corrected newton in my backyard (B96). 9 exposures of 120sec each were taken with clear filter.