Comets - 230P/LINEAR - 0230P
Type Periodic Perihelion Date 18 November 2015 Perihelion Distance (q) 1.5 Aphelion Distance (Q) 5.3 Period (Years)   6.3 Eccentricity (e)   0.56 Inclination (i)   14.7 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 14 August 2018
COMETS COMETS
DEEP SKY DEEP SKY
An apparently asteroidal object of 18th magnitude discovered by LINEAR with the 1.0-m reflector on 2009 October 27 was found to show a cometary appearance by other astrometrists, The comet was at perihelion at 1.5 AU in early August and has a period of around 6.3 years. Following improved astrometry S. Nakano identified observations of the comet among single- night data from NEAT at the two preceding apparitions in 1997 and 2002, with it being assigned the identifications 1997 A2 and 2002 Q15. Rob Matson independently located the images corresponding to these observations, together with some additional ones and provided measurements. The comet's approach to a distance of 0.88 AU from Jupiter in September 2007 means that the orbital period, currently 6.27 years, was previously 6.48-6.49 years, with the comet's previous two perihelion passages occurring on 2003 Mar. 3 and 1996 Sept. 4. Date 10x10 mag Error Kphot mag Coma ' 17-Aug-15 17.97 0.08 15.1 0.2 25-Aug-15 17.90 0.03 14.4 0.2 08-Sep-15 17.25 0.02 17.1 0.2 16-Sep-15 17.11 0.02 16.6 0.2 23-Sep-15 16.79 0.02 16.8 0.2 06-Oct-15 16.33 0.01 15.6 0.2 13-Oct-15 16.00 0.01 15.6 0.2 20-Oct-15 15.79 0.01 15.3 0.2 04-Nov-15 15.21 0.01 14.7 0.2 13-Nov-15 14.82 0.01 14.0 0.2 20-Nov-15 14.66 0.02 13.6 0.3 03-Dec-15 14.23 0.01 13.5 0.3 09-Dec-15 14.11 0.04 13.4 0.3 16-Dec-15 14.21 0.01 13.3 0.4 25-Feb-16 17.09 0.05 15.9 0.2
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