C/2001 OG108 (LONEOS)
|Discovered by||M. E. Van Ness
LONEOS telescope at Lowell Observatory
|Discovery date||28 July 2001|
|Orbital characteristics A|
|Epoch||15 December 2001
|Aphelion||25.606 AU (Q)|
|Perihelion||0.99404 AU (q)|
|Semi-major axis||13.300 AU (a)|
|Orbital period||48.51 yr|
Observations taken in January and February 2002 showed that the "asteroid" had developed a small amount of cometary activity as it approached perihelion. It was subsequently reclassified as a comet. The comet came to perihelion (closest approach to the Sun) on 15 March 2002. The next perihelion passage is calculated to be on 6 June 2050.
In 2003, the comet was estimated to have a mean absolute V magnitude (H) of 13.05 ± 0.10, with an albedo of 0.03, giving an effective radius of 8.9 ± 0.7 km. Using data from Fernandez (2004–2005) JPL lists the comet with an albedo of 0.05 and a diameter of 13.6 ± 1.0 km.
This comet probably represents the transition between typical Halley-family/long-period comets and extinct comets. Damocloids have been studied as possible extinct cometary candidates due to the similarity of their orbital parameters with those of Halley-family comets.
- Abell, P. A.; Fernandez, Y. R.; Pravec, P.; French, L.M.; Farnham, T.L.; Gaffey, M.J.; Hardersen, P.S.; Kusnirak, P.; Sarounova, L.; Sheppard, S.S. (2003). "Physical Characteristics of Asteroid-like Comet Nucleus C/2001 OG108 (LONEOS)". 34th Annual Lunar and Planetary Science Conference. Bibcode:2003LPI....34.1253A.
- French, L.M. (2002). "Pre-Activity BVRI Colors of High-Inclination Comet C/2001 OG108 (LONEOS)". American Astronomical Society, DPS Meeting No. 34, #16.01 34: 868. Bibcode:2002DPS....34.1601F.
- "JPL Small-Body Database Browser: C/2001 OG108 (LONEOS)" (last observation: 2002-07-03; arc: 340 days). Jet Propulsion Laboratory. Retrieved 18 May 2011.
- Horizons output. "Observer Table for Comet C/2001 OG108 (LONEOS)". Retrieved 7 April 2011. (Observer Location:@sun)