text: Discovery Discovered by: Terry Lovejoy, Kazimieras Cernis, Bo Zhou, and Sebastian Hönig Discovery date: September 4, 1999 Alternate designations: P/1999 R1, P/2003 R5 Orbital characteristics A Aphelion distance: 4.9903 AU Perihelion distance: 0.0570 AU Semi-major axis: 2.5237 AU Eccentricity: 0.9774 Orbital period: 4.01 yr Inclination: 13.676° Last perihelion: September 11, 2007 Next perihelion: September 7, 2011