The correct title of this article is (55565) 2002 AW197. It features superscript or subscript characters that are substituted or omitted because of technical limitations.
dwarf planet candidate 2002 AW197 as taken by the Spitzer Space Telescope on 2004 April 13.
|
|
|
Discovery
|
|
|---|---|
| Discovered by | Michael E. Brown, Eleanor F. Helin, Michael Hicks, Kenneth J. Lawrence, Steven H. Pravdo, Chad Trujillo |
| Discovery date | January 10, 2002 |
|
Designations
|
|
| MPC designation | (55565) 2002 AW197 |
| Alternate name | none |
| Minor planet category |
TNO (cubewano)[1] |
| Epoch December 31, 2006 (JD 2 454 100.5) | |
| Aphelion | 8 003.964 Gm (53.503 AU) |
| Perihelion | 6 143.329 Gm (41.066 AU) |
| Semi-major axis | 7 073.647 Gm (47.284 AU) |
| Eccentricity | 0.132 |
| Orbital period | 118 761.410 d (325.15 a) |
| Average orbital speed | 4.31 km/s |
| Mean anomaly | 281.945° |
| Inclination | 24.410° |
| Longitude of ascending node | 297.513° |
| Argument of perihelion | 295.307° |
|
Physical characteristics
|
|
| Dimensions | 734+116−108 km[2] 700±50 km[3] |
| Mass | ≈4.1 × 1020? kg[4] |
| Mean density | 2.0? g/cm³ |
| Equatorial surface gravity | 0.2216? m/s² |
| Escape velocity | 0.4192? km/s |
| Sidereal rotation period |
? d |
| Albedo | 0.117+.04−.03[2] 0.17±0.03[3] |
| Temperature | ~39–40 K |
| Spectral type | ? |
| Apparent magnitude | 20.0 (opposition)[5][6] |
| Absolute magnitude (H) | 3.27[7] |
(55565) 2002 AW197 is a trans-Neptunian object (TNO). It was discovered in 2002 by Michael E. Brown et al. It is classified as a cubewano.
Measurements with the Spitzer Space Telescope have confirmed 2002 AW197 as a reliable dwarf planet candidate. It is located near the Kuiper cliff.
Contents |
Dwarf planet candidate
Observations of thermal emissions by the Spitzer Space Telescope in 2007 give a diameter of 734+116−108 km[2] and an albedo of 0.117+.04−.03.[2] The lower size estimate for a dwarf planet is about 400km.[8]
Surface
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).
Distance
It is currently 46.5 AU from the Sun.[5] It will come to perihelion around 2079.[7]
External links
- AstDys orbital elements
- Orbital simulation from JPL (Java)
References
- ^ "MPEC 2009-A63 : DISTANT MINOR PLANETS (2009 JAN. 29.0 TT)". Minor Planet Center. 2009-01-13. http://www.cfa.harvard.edu/mpec/K09/K09A63.html. Retrieved on 2009-02-03.
- ^ a b c d John Stansberry, Will Grundy, Mike Brown, Dale Cruikshank, John Spencer, David Trilling, Jean-Luc Margot (2007). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". University of Arizona, Lowell Observatory, California Institute of Technology, NASA Ames Research Center, Southwest Research Institute, Cornell University. http://arxiv.org/abs/astro-ph/0702538v2. Retrieved on 2008-11-18.
- ^ a b Cruikshank, Dale P.; Stansberry, John A.; Emery, Joshua P.; et al. (2005). "The High-Albedo Kuiper Belt Object (55565) 2002 AW197". The Astrophysical Journal 624 (1): L53–L56. doi:. http://adsabs.harvard.edu/abs/2005ApJ...624L..53C. Retrieved on 2008-06-28.
- ^ Using the 2007 Spitzer spherical radius of 367 km; volume of a sphere * an assumed density of 2 g/cm³ yields a mass (m=d*v) of 4.14E+20 kg
- ^ a b "AstDys (55565) 2002AW197 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-04-18. http://www.webcitation.org/query?id=1240086960752667. Retrieved on 2009-03-16.
- ^ "HORIZONS Web-Interface". JPL Solar System Dynamics. http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2002AW197. Retrieved on 2008-07-02.
- ^ a b "JPL Small-Body Database Browser: 55565 (2002 AW197)". 2005-01-16 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=55565. Retrieved on 2008-06-28.
- ^ Mike Brown. "The Dwarf Planets". http://web.gps.caltech.edu/~mbrown/dwarfplanets/. Retrieved on 2008-01-20.
- 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
|
|||||
|
|||||||||||
|
||||||||
 |
This article about a centaur or trans-Neptunian object is a stub. You can help Wikipedia by expanding it. |
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
