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223P/SKIFF -  (= P/2002 S1 = P/2009 L18)

Photometric data obtained by use of FOCAS-II software

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

OBJECT        DATE       TIME        +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

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                                                                     AFRHO         LOG

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

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IAUC 7972: comet P/2002 S1

B. Skiff, Lowell Observatory, reports his discovery of a comet on images taken by him in the course of the LONEOS program, with the available observations given below.  The object has a moderately condensed coma of diameter 10" and a tail 30" long in p.a. 285 deg.  At Skiff's request, M. Hayes-Gehrke obtained a confirming 5-min CCD R frame (also on Sept. 17) with the Lowell Observatory's Perkins 1.8-m telescope, showing a 8" coma and a tail about 30" long in p.a. 280 or 285 deg.

Recovery CBET 1913: comet P/2009 L18:

G. Sostero, E. Guido, P. Camilleri and E. Prosperi report the recovery of comet P/2002 S1 (cf. IAUC 7972) from the coaddition of 40 unfiltered 60-s CCD exposures obtained remotely on 2009 June 15.6 UT with the 0.35-m f/7 reflector at the Skylive-Grove Creek Observatory (near Trunkey, NSW, Australia).  The recovery was confirmed from the coaddition of 10 unfiltered 300-s exposures with the same equipment on Aug. 18.6.  The object was of stellar appearance on each occasion.  According to CBET nr.1913, this object will reach its perihelion (q~ 2.4 AU) on 2010, Aug. 15. The ephemerids generated at the Minor Planet Center website inform us that P/2009 L18 (SKIFF) will reach its maximum brightness at perigee, on the beginning of next November 2010 (about magnitude 17). Its last astrometric report before our recovery was performed on 2003 Apr. 07.89 by Peter Birtwhistle, from the Great Shefford Observatory (MPC#J95).