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Comet C/2018 A1 (PANSTARRS)

Photometric data obtained from FOCAS-II software

COD U69

CON iTelescope.net SRO Observatory Auberry California USA   

CATALOG: USNO A2.0 / CMC 14-15 - BAND: R

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

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

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

C/2018 A1     31/01/2018 23:36:16  18.52  17.88  17.74  17.32  17.12          5.1  17.1  B96

C/2018 A1     31/01/2018 23:36:16*  0.04   0.33   0.49   0.25   0.08            3   3.9  USN

                                                                     AFRHO         LOG

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

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

C/2018 A1     31/01/2018 23:36:16    2.08   2.76  13.24  18.29    5     15     3  1.186  B96

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

http://cara.uai.it

E. Lilly, R. J. Wainscoat, and R. Weryk have discovered a comet on four i-band exposures taken with the 1.8-m Pan-STARRS1 telescope at Haleakala on Jan. 6 ; the object appears very soft compared to adjacent stars in 1".25-1".75 seeing (in which

the comet's co-added image has a FWHM of approximately 2".5), and the object appears asymmetric with a low-surface-brightness extension to the west-northwest that may be a faint tail. P. Birtwhistle (Great Shefford, Berkshire, England report that this object shows a cometary appearance, with a coma up to 22" in diameter (mag 18.4-19.2), possibly slightly extended to the southwest.