Comets - 187P/LINEAR - 0187P
Type Periodic Perihelion Date 5 June 2018 Perihelion Distance (q) 3.9 Aphelion Distance (Q) 5.3 Period (Years)   9.9 Eccentricity (e)   0.16 Inclination (i)   13.6 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 10 July 2018
An apparently asteroidal 19th mag object reported by LINEAR on 12 and 17 May 1999, and linked by G. V. Williams to LINEAR observations on 8 and 10 June by way of a cometlike orbit, was posted on The NEO Confirmation Page for additional observations. P. Pravec and P. Kusnirak, Ondrejov, reported that their 12 June CCD images showed a faint coma and a tail marginally visible to the southwest. Also, A. Sugie, Dynic Astronomical Observatory, reported strong condensation and a coma diameter of 12" on 14 June . Eric Christensen recovered comet 1999 J5 (P/LINEAR) in images taken on 9 March 2008 during the course of the Mount Lemmon Survey, with additional images taken by R A Kowalski on 10 March . Seiichi Yoshida notes that in the comet was fainter by 2 magnitudes in the 2008 returnand that, in the 1999 apparition, the comet was not observed in 2000, one year after the discovery, although it would have been expected to be almost as bright as at the discovery, which suggests that the comet might have been temporarily bright in outburst in 1999. Date 10x10 mag Error Kphot mag Coma ' 24-Jan-17 18.31 0.04 18.0 0.2 27-May-17 20.52 0.14 20.4 0.2 16-Apr-18 19.83 0.10 19.7 0.2 07-Jun-18 19.33 0.06 19.2 0.2 01-Jul-18 19.32 0.04 19.1 0.2