(55565) 2002 AW197
| 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 | 10 January 2002 |
| Designations | |
| MPC designation | (55565) 2002 AW197 |
| none | |
| Cubewano (MPC)[2] Extended (DES)[3] |
|
| Orbital characteristics[4] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 6647 days (18.20 yr) |
| Aphelion | 53.771 AU (8.0440 Tm) |
| Perihelion | 41.282 AU (6.1757 Tm) |
| 47.526 AU (7.1098 Tm) | |
| Eccentricity | 0.13139 |
| 327.65 yr (119674 d) | |
|
Average orbital speed
|
4.31 km/s |
| 293.876° | |
| 0° 0m 10.83s / day | |
| Inclination | 24.351° |
| 297.438° | |
| 293.300° | |
| Earth MOID | 40.3467 AU (6.03578 Tm) |
| Jupiter MOID | 36.369 AU (5.4407 Tm) |
| Physical characteristics | |
| Dimensions |
768+39 −108 km[6] 700±50 km[7] |
| 8.86 h (0.369 d) | |
|
Sidereal rotation period
|
8.86 h [4] |
| 0.117+0.04 −0.03[6] 0.17±0.03 [7] |
|
| Temperature | ≈ 39–40 K[citation needed] |
| (moderately red) B−V=0.91, V−R=0.56[8] |
|
| 20.0 (opposition)[9][10] | |
| 3.5[4] | |
(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[edit]
Observations of thermal emissions by the Spitzer Space Telescope in 2007 give a diameter of 734+116
−108 km[6] and an albedo of 0.117+0.04
−0.03.[6] The newest estimate is 768+39
−38 km[5]
Surface[edit]
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[edit]
As of 2013[update], it is currently 46.0 AU from the Sun.[9] It will come to perihelion around 2078.[4]
References[edit]
- ^ a b Marsden, Brian G. (2002-07-20). "MPEC 2002-O30 : 2002 AW197". IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. Retrieved 2010-01-06.
- ^ "MPEC 2009-R09 :Distant Minor Planets (2009 SEPT. 16.0 TT)". IAU Minor Planet Center. 2009-09-04. Retrieved 2009-10-04.
- ^ Marc W. Buie. "Orbit Fit and Astrometric record for 55565" (2009-03-23 using 112 observations). SwRI (Space Science Department). Retrieved 2009-10-04.
- ^ a b c d "JPL Small-Body Database Browser: 55565 (2002 AW197)" (2005-01-16 last obs). Retrieved 6 April 2016.
- ^ a b TNOs are Cool: A survey of the trans-Neptunian region. X. Analysis of classical Kuiper belt objects from Herschel* and Spitzer observations p. 18
- ^ a b c d John Stansberry; Will Grundy; Mike Brown; Dale Cruikshank; John Spencer; David Trilling; et al. (2007). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". arXiv:astro-ph/0702538
[astro-ph]. - ^ 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. Bibcode:2005ApJ...624L..53C. doi:10.1086/430420.
- ^ Tegler, Stephen C. (2007-02-01). "Kuiper Belt Object Magnitudes and Surface Colors". Retrieved 2009-12-30.
- ^ a b "AstDys (55565) 2002AW197 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2013-12-14.
- ^ "HORIZONS Web-Interface". JPL Solar System Dynamics. Retrieved 2008-07-02.
- ^ 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
- ^ Tancredi, G. (2010). "Physical and dynamical characteristics of icy "dwarf planets" (plutoids)". Icy Bodies of the Solar System: Proceedings IAU Symposium No. 263, 2009.
- ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2011-08-25.
- ^ D. Ragozzine; M. E. Brown (2007). "Candidate Members and Age Estimate of the Family of Kuiper Belt Object 2003 EL61". The Astronomical Journal. 134 (6): 2160–2167. arXiv:0709.0328
. Bibcode:2007AJ....134.2160R. doi:10.1086/522334. Retrieved 2009-12-05.
Further[edit]
- 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[edit]
| Wikimedia Commons has media related to (55565) 2002 AW197. |
- AstDys orbital elements
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- (55565) 2002 AW197 at the JPL Small-Body Database