60P/Tsuchinshan (0060P)

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Type: Periodic Perihelion date: 9 December 2018 Perihelion distance (q): 1.6 Aphelion distance (Q) : 5.4 Period (years): 6.6 Eccentricity (e): 0.54 Inclination (i): 3.6 JPL orbit diagram COBS lightcurve The comet was discovered at the Purple Mountain Observatory on 11 January 1965, moving through Cancer. The magnitude was estimated as 15. An additional observation was obtained on 13 January. The comet remained a relatively faint object during its discovery apparition. It was followed until 31 May, at which time Elizabeth Roemer determined the nuclear magnitude as 19.1. The comet was again seen in 1978 and at all subsequent apparitions. The 1998-1999 apparition was the best, with the comet remaining visible for over 6 months and becoming slightly brighter than magnitude 15. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 24-Sep-18 17.43 0.15 17.1 0.2 12-Oct-18 16.39 0.03 16.0 0.2 19-Oct-18 16.14 0.07 14.7 0.4 18-Nov-18 15.19 0.02 14.3 0.6 04-Dec-18 14.91 0.01 13.5 0.7 11-Dec-18 14.86 0.02 13.8 0.5 18-Dec-18 14.79 0.01 13.6 0.7 01-Jan-19 14.72 0.03 13.1 0.6 13-Jan-19 14.71 0.03 13.2 0.6 30-Apr-19 17.13 0.02 14.2 0.6 07-May-19 17.45 0.03 14.3 0.6 01-Jun-19 18.31 0.06 15.3 0.6