201P/LONEOS (0201P)

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Type: Periodic Perihelion date: 26 May 2021 Perihelion distance (q): 1.2 Aphelion distance (Q) : 5.5 Period (years): 6.1 Eccentricity (e): 0.64 Inclination (i): 5.7 JPL orbit diagram COBS lightcurve An apparently asteroidal 18th mag (red) object discovered by LONEOS on 10 September 2001 and posted on the NEO Confirmation Page was found to be cometary. Improved orbital elements were published on MPEC 2001-S05, including prediscovery observations on 19 August by LINEAR by B. G. Marsden and these indicate that this comet passed only 0.014 AU from Mars on 10 January 2002, as first suggested by C.-I. Lagerkvist (Uppsala) and G. Hahn (German Aerospace Center, Berlin). Comet 2001 R1 (P/LONEOS) was recovered by Michael Jaeger from Stixendorf, Austria on 31 August 2001 as a 17th magnitude object. It was confirmed by Giovanni Sostero and team from the Skylive Observatory, Catania, Italy the following night. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 12-Sep-14 15.84 0.02 14.8 0.3 19-Sep-14 15.89 0.02 14.8 0.4 29-Sep-14 16.03 0.01 14.2 0.5 10-Oct-14 15.77 0.01 14.8 0.2 17-Oct-14 15.80 0.02 14.6 0.4 27-Oct-14 16.06 0.04 14.9 0.4 07-Nov-14 16.26 0.05 15.2 0.2 17-Nov-14 16.35 0.02 15.3 0.3 25-Nov-14 16.39 0.02 15.4 0.3 03-Dec-14 16.23 0.04 15.5 0.2 12-Dec-14 16.14 0.05 14.9 0.4 01-Jan-15 16.26 0.07 15.3 0.2 17-Dec-15 16.70 0.03 15.5 0.2 16-Dec-15 18.83 0.51 18.3 0.2