Comet C/2021 T4 (LEMMON)

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

Astrometric data for minor planet center

COD X02

CON E. Bryssinck, Kruibeke, Belgium

OBS E. Bryssinck, M. Rocchetto, E. Guido, M. Fulle

OBS G. Milani, C. Nassef, G. Savini, A. Valvasori

MEA E. Bryssinck

TEL 0.61-m f/6.5 reflector + CCD

ACK NEOCP X02 file updated 2021.10.11 15:51:32

NET Gaia DR2

C6131F2 KC2021 10 11.35147 04 00 36.34 +11 48 19.0 19.5 G X02

C6131F2 KC2021 10 11.36226 04 00 35.96 +11 48 16.9 19.9 G X02

----- 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 25/11/2022 21:14:49 16.20 15.64 15.41 15.22 15.14 15.05 13.0 17.4 B96

C/2021 T4 25/11/2022 21:14:49* 0.08 0.12 0.14 0.15 0.13 0.10 2 3.7 Gai

AFRHO LOG

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

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

C/2021 T4 25/11/2022 21:14:49 2.75 3.46 10.02 16.14 13 304 23 2.483 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