(55565) 2002 AW197

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(55565) 2002 AW197
2002AW197-Spitzer.jpg
Probable dwarf planet 2002 AW197 as taken by the Spitzer Space Telescope on 13 April 2004
Discovery[1]
Discovered by Michael E. Brown
Chad Trujillo
Eleanor F. Helin
Michael Hicks
Kenneth J. Lawrence
Steven H. Pravdo
Palomar Observatory (675)
Discovery date January 10, 2002
Designations
MPC designation (55565) 2002 AW197
none
Cubewano (MPC)[2]
Extended (DES)[3]
Orbital characteristics
Epoch December 31, 2006 (JD 2 454 100.5)
Aphelion 53.503 AU (8.0040 Tm)
Perihelion 41.066 AU (6.1433 Tm)
47.284 AU (7.0736 Tm)
Eccentricity 0.132
325.15 a (118761 d)
4.31 km/s
281.945°
Inclination 24.410°
297.513°
295.307°
Physical characteristics
Dimensions 768+39
−38 km [4] 734+116
−108 km[5]
700±50 km[6]
8.86 h [7]
Albedo 0.117+0.04
−0.03[5]
0.17±0.03 [6]
Temperature ≈ 39–40 K[citation needed]
Spectral type
 (moderately red)
B−V=0.91, V−R=0.56[8]
20.0 (opposition)[9][10]
3.5[7]

(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.[11] Tancredi (2010) accepts it as a dwarf planet.[12] Mike Brown's website lists it as a highly likely dwarf planet.[13]

It was discovered on January 10, 2002, by Michael Brown et al.[1] It is located near the Kuiper cliff.

Characteristics

Observations of thermal emissions by the Spitzer Space Telescope in 2007 give a diameter of 734+116
−108 km[5] and an albedo of 0.117+0.04
−0.03.[5] The newest estimate is 768+39
−38 km[4]

Surface

ESO analysis of spectra reveals a strong red slope and no presence of water ice[14] (in contrast to Quaoar, also red) suggesting organic material (see comparison of colours and typical composition inferred from spectra of the TNOs).

Distance

As of 2013, it is currently 46.0 AU from the Sun.[9] It will come to perihelion around 2078.[7]

References

  1. ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 TNOs are Cool: A survey of the trans-Neptunian region. X. Analysis of classical Kuiper belt objects from Herschel* and Spitzer observations p. 18
  5. ↑ 5.0 5.1 5.2 5.3 Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ 7.0 7.1 7.2 Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ 9.0 9.1 Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Tancredi, G., & Favre, S. (2008) Which are the dwarfs in the Solar System?. Depto. Astronomía, Fac. Ciencias, Montevideo, Uruguay; Observatorio Astronómico Los Molinos, MEC, Uruguay. Retrieved 10-08-2011
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.

Further

  • Cruikshank, D., et al. High Albedo KBO (55565)2002 AW197, The Astronomical Journal Letters, 624,53 (May 2004). Abstract
  • Doressoundiram, A.; Barucci, M. A.; Tozzi, G. P.; Poulet, F.; Boehnhardt, H.; de Bergh, C.; Peixinho, N. Spectral characteristics and modeling of the trans-neptunian object (55565) 2002 AW197 and the Centaurs (55576) 2002 GB10 and (83982) 2002 GO9: ESO Large Program on TNOs and Centaurs. Planetary and Space Science, 53, Issue 14-15, p. 1501–1509 (2005). Abstract

External links

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