Comet C/2021 T1 (LEMMON)

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Comet C/2021 T1 (LEMMON) - 4 oct. 2021

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 NEOCP B96 file updated 2021.10.05 15:12:05

NET Gaia DR2

C60DRY2 KC2021 10 04.84390 23 42 03.30 +43 57 07.5 19.5 G B96

C60DRY2 KC2021 10 04.86335 23 41 58.15 +43 56 53.2 20.2 G B96

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COD Z08

OBS BRIXIIS Observatory

CATALOG: Gaia DR2 - BAND: G

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

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

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AFRHO LOG

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

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FoCAs 3.66

www.astrosurf.com/cometas-obs

es.groups.yahoo.com/group/Cometas_Obs

Photometry obtained with FOCAS-II software:

image comet C/2021 T1 (LEMMON), Erik Bryssinck, 4 oct. 2021

R. Haver and R. Gorelli report cometary activity of an asteroidal NEOCP candidate (submitted by Mount Lemmon Survey on Oct. 2 UT) in forty 90-second images taken on Oct. 2 at Frasso Sabino Observatory (157), noting a diffuse 8" coma. Prediscovery images were reported back to Sep. 2021. Additional reports of cometary features are as follows:

OC Date Reporter Coma Tail PA Exposures

H06 2021-10-03 H. Sato 6" 14x60s

B49 2021-10-04 J. Camarasa 12" 10" 180

B96 2021-10-04 E. Bryssinck 8" 12" 317 30x90s

MPEC 2021-T168: COMET C/2021 T1 (Lemmon)