10 January 2002
10 January 2002
Argument of perihelion
(55565) 2002 AW197
6647 days (18.20 yr)
Michael E. BrownChad TrujilloEleanor F. HelinMichael HicksKenneth J. LawrenceSteven H. PravdoPalomar Observatory (675)
Minor planet category
Cubewano (MPC)Extended (DES)
Michael E. Brown, Steven H. Pravdo, Chad Trujillo, Kenneth J. Lawrence, Eleanor F. Helin
Michael E Brown discoveries, Other celestial objects
55565 2002 aw197
(55565) 2002 AW197 is a classical Kuiper belt object (cubewano). Measurements with the Spitzer Space Telescope have confirmed 2002 AW197 as a probable dwarf planet, although it has not been officially classified as such by the IAU. Light-curve-amplitude analysis shows only small deviations, which suggests that 2002 AW197 is a spheroid with small albedo spots. Tancredi (2010) accepts it as a dwarf planet. Mike Brown's website lists it as a highly likely dwarf planet.
It was discovered on January 10, 2002, by Michael Brown et al. It is located near the Kuiper cliff.
Observations of thermal emissions by the Spitzer Space Telescope in 2007 give a diameter of 7005734000000000000♠734+116
−108 km and an albedo of 6999117000000000000♠0.117+0.04
−0.03. The newest estimate is 7005768000000000000♠768+39
ESO analysis of spectra reveals a strong red slope and no presence of water ice (in contrast to Quaoar, also red) suggesting organic material (see comparison of colours and typical composition inferred from spectra of the TNOs).
As of 2013, it is currently 46.0 AU from the Sun. It will come to perihelion around 2078.