198P/ODAS (0198P)

Type: Periodic Perihelion date: 9 October 2025 Perihelion distance (q): 2.0 Aphelion distance (Q) : 5.2 Period (years): 6.8 Eccentricity (e): 0.44 Inclination (i): 1.3 JPL orbit diagram COBS lightcurve Atlas 2006 B7 (198P/ODAS) The Observatoire de la Cote d'Azur-Deutsches Zentrum fur Luft und Raumfahrt Asteroid Survey (ODAS) discovered an 18th magnitude comet on 15 December 1998 with the 0.90-m Caussols Schmidt camera. In March 2008, Gareth Williams identified images of comet P/1998 X1 taken at its 2006 return. He found that Spacewatch images taken between January and March and Mt Lemmon images from March show the comet, which was around 21st magnitude. The observations from the two apparitions do not fit together very well, leaving residuals of up to 5". Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma '