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 comet 324P/LA SAGRA - (= 2010 R2)

Photometric data obtained by use of FOCAS-II software

                                   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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Discovery:

The La Sagra team (Spain) discovered another comet on 2010 September 14.87 and were able to find pre-discovery observations from August 13.0. The object was confirmed as cometary by Peter Birtwhistle and fellow astrometrists. The comet was around 19th magnitude. It has a period of 5.5 years and was at perihelion at 2.6 au in late June. The object appears to be another main-belt comet, similar to 133P = (7968) Elst-Pizarro.

Recovery:

The comet was recovered by S. S. Sheppard with the Magellan-Baade telescope in images taken in 2015 March and April, but the recovery was first reported by Jim Scotti in images taken with the Spacewatch 1.8-m telescope at Kitt Peak on 2015 May 22.43. The indicated correction to the prediction by S. Nakano is Delta(T) = -0.03 day.� [CBET 4107, MPEC 2015-K101, 2015 May 26].  The Magellan-Baade images showed a tail, which was confirmed by CFH images, according to IAUC 9276 [2015 August 3].  This notes that the object is the fourth main belt comet to show recurrent activity when near perihelion after being inactive at aphelion.