391P/Kowalski (0391P)

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Type: Periodic Perihelion date: 12 May 2028 Perihelion distance (q): 4.1 Aphelion distance (Q) : 5.2 Period (years): 10.2 Eccentricity (e): 0.12 Inclination (i): 21.3 JPL orbit diagram COBS lightcurve PK06F010 = 0391P R Kowalski discovered an 18th magnitude comet on 21 March 2006 during the course of the Mt Lemmon survey with the 1.5-m reflector. The initial orbit suggested that it would reach perihelion at 1.9 AU in May 2007, when it might reach 13th magnitude. Further observations showed that it is in a periodic orbit, as first suggested by Hirohisa Sato. The comet appears to have had a recent close encounter with Jupiter. The comet was recovered by Kevin Hills on 22 October 2019 in images taken with his 0.5-m f/2.9 astrograph at Tacande Observatory, La Palma. It was also recovered by PanSTARRS on 25 October, with both sites reporting additional pre-recovery images. The indicated delta-T correction to the prediction on MPC 94677 was -0.06 days. [CBET 4686, MPEC 2019-U193, 2019 October 26/28] Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 07-Oct-19 20.14 0.03 19.7 0.2 22-Oct-19 20.26 0.06 19.8 0.2 24-Oct-19 20.29 0.16 20.0 0.2 28-Oct-19 20.45 0.24 20.0 0.2