319P/Catalina-McNaught (0319P)

Type: Periodic Perihelion date: 31 March 2022 Perihelion distance (q): 1.2 Aphelion distance (Q) : 5.9 Period (years): 6.7 Eccentricity (e): 0.67 Inclination (i): 15.1 JPL orbit diagram COBS lightcurve Rob McNaught discovered a 17th magnitude comet on 17 September 2008 on CCD images taken with the 0.5-m Uppsala Schmidt telescope at Siding Spring Observatory. Brian Marsden subsequently linked the comet to asteroid 2008 JK, discovered during the Catalina Sky Survey on 2 May. The comet was therefore renamed from McNaught to Catalina-McNaught. The improved orbit shows that the comet approached to 0.18 au from Jupiter in August 1990, before which its perihelion distance was 1.5 au. The comet was near perihelion at discovery. An object found in infra-red images from the NEOWISE satellite on 5 April 2015 was identified as the return of 2008 S1 (P/Catalina-McNaught) by Gareth Williams. The indicated correction to the prediction on MPC 79350 was Delta(T) = -0.11 day. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 22-Jul-15 17.17 0.11 16.6 0.2 17-Aug-15 17.95 0.10 14.6 0.2 25-Aug-15 18.26 0.12 16.4 0.2 08-Sep-15 18.61 0.10 15.7 0.2 16-Sep-15 18.63 0.11 15.4 0.2 23-Sep-15 18.83 0.14 18.2 0.2 08-Oct-15 18.87 0.09 18.4 0.2 17-Oct-15 19.04 0.14 17.2 0.2