Comets - 211P/Hill - 0211P
Type Periodic Perihelion Date 27 January 2016 Perihelion Distance (q) 2.4 Aphelion Distance (Q) 4.8 Period (Years)   6.7 Eccentricity (e)   0.34 Inclination (i)   18.9 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 16 November 2018
COMETS COMETS
DEEP SKY DEEP SKY
The comet was discovered by Rick Hill at 17th magnitude on CCD images taken with the 0.68-m Catalina Schmidt telescope on December 4, 2008. Calculations by Hirohisa Sato allow for the possibility of an elliptic orbit of period 11 years and perihelion at 2.0 AU in early June 2009. This was confirmed by subsequent orbits, which give a period of 6.7 years and perihelion 2.4 AU in 2009 May. With an improved orbit, Maik Meyer subsequently found previously unidentified images of the comet on frames taken by NEAT on 2003 March 24 and LONEOS on 2003 April 1. The comet was given the designation 2003 F6 at this return, which had perihelion on 2002 August 19.1. The comet suffered a minor encounter with Jupiter in 1925, but the orbit has been stable since then.  It approaches Jupiter to 0.38 au in 2032 August, which will increase the perihelion distance from 2.3 to 2.7 au. Date 10x10 mag Error Kphot mag Coma ' 17-Nov-15 18.21 0.06 15.6 0.2 09-Dec-15 17.79 0.05 15.9 0.2 04-Feb-16   17.17 0.05 15.8 0.2 05-Feb-16   17.22 0.02 15.6 0.2
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