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Comet C/2021 S1 (ATLAS) - 29 sept. 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 Z08

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 0.7-m f/8 reflector + CCD

ACK NEOCP Z08 file updated 2021.09.29 22:12:36

NET Gaia DR2

     A10BpPq KC2021 09 29.13444 06 55 01.58 +57 40 15.4          19.8 G      Z08

     A10BpPq KC2021 09 29.14879 06 55 02.03 +57 40 15.2          19.7 G      Z08

----- 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

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

                                                                     AFRHO         LOG

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

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

FoCAs 3.66

www.astrosurf.com/cometas-obs

es.groups.yahoo.com/group/Cometas_Obs

Photometry obtained with FOCAS-II software:

A. Fitzsimmons reports the discovery of a comet in four 30-second survey images taken on Sep. 27 UT by ATLAS-HKO (T05), noting a condensed 9" coma.  

While this object was still mentioned on the PCCP, we could observe this object with the Telescope.Live 0.7-m f/8 Ritchey-Chretien in Oria, Spain, and confirm the cometary features of this object. Later was this object assigned as comet C/2016 S1 (ATLAS) via M.P.E.C. 2021-T21, issued on 2021 oct. 3th.