2001 XR254
| Discovery[1] | |
|---|---|
| Discovered by | David C. Jewitt, Scott S. Sheppard and J. Kleyna |
| Discovery date | 10 December 2001 |
| Designations | |
| MPC designation | 2001 XR254 |
| TNO (cubewano)[1] | |
| Orbital characteristics[2] | |
| Epoch 13 January 2013 (JD 2454100.5) | |
| Aphelion | 44.499 AU |
| Perihelion | 41.769 AU |
| 43.134 AU | |
| Eccentricity | 0.032 |
| 283.30 a | |
| 232.172° | |
| Inclination | 1.232° |
| 179.933° | |
| 68.598° | |
| Known satellites | 1 |
| Physical characteristics | |
| Dimensions |
221+41 −71 km (combined) 171+32 −55 km (primary) 140+26 −45 km (satellite)[3] |
| Mass | (4.055±0.065)×1018 kg[3] |
Mean density |
1.00+0.96 −0.56 g/cm3[3][lower-alpha 1] |
| Albedo |
0.136+0.168 −0.044[3] |
Spectral type | V−I=1.06 ± 0.12[4] |
| 6.05 ± 0.15[5] | |
|
| |
2001 XR254 is a binary classical Kuiper belt object belonging to the cold population.[3]
Discovery and orbit
2001 XR254 was discovered on 10 December 2001 by David C. Jewitt, Scott S. Sheppard and Jan Kleyna using 2.2-m University of Hawaii reflector on Mauna Kea.[1][4] 2001 XR254 belongs to the dynamically cold population of the classical Kuiper belt objects, which small orbital eccentricities and inclinations. Their semi-major axes reside mainly in the interval 40–45 AU.[3]
Satellite
2001 XR254 is a binary consisting of two components of approximately equal size. Assuming that both components have the same albedo, the primary is estimated to be about 170 km in diameter. The size of the secondary (satellite) in this case is estimated at about 140 km. The total mass of the system is about 4×1018 kg. The average density of both components is about 1 g/cm3.[3]
| Semi-major axis (km) | Eccentricity | Period (d) | Inclination (°) |
| 9310 ± 49 | 0.5561 ± 0.0046 | 125.579 ± 0.049 | 41.07 ± 0.22 |
Physical properties
The surfaces of both components of 2001 XR254 appear to have a neutral color.[5]
Notes
- ↑ Assuming that both components have equal albedos and equal densities
References
- 1 2 3 Marsden, Brian G. (2002-11-01). "MPEC 2002-V07 : 2001 XR254, 2001 XS254, 2001 XU254". IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. Retrieved 2016-03-08.
- ↑ "JPL Small-Body Database Browser: (2001 XR254)" (2009-02-26 last obs). Retrieved 2016-03-08.
- 1 2 3 4 5 6 7 Vilenius, E.; Kiss, C.; Mommert, M.; et al. (2014). ""TNOs are Cool": A survey of the trans-Neptunian region X. Analysis of classical Kuiper belt objects from Herschel and Spitzer observations". Astronomy & Astrophysics. 564: A35. arXiv:1403.6309
. Bibcode:2012A&A...541A..94V. doi:10.1051/0004-6361/201322416. - 1 2 Wm. Robert Johnston (23 June 2015). "2001 XR254". Johnston's Archive. Retrieved 2016-03-09.
- 1 2 Vilenius, E.; Kiss, C.; Mommert, M.; et al. (2014). ""TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel>/PACS observations and thermal modeling of 19 classical Kuiper belt objects". Astronomy & Astrophysics. 541: A94. arXiv:1204.0697. Bibcode:2012A&A...541A..94V. doi:10.1051/0004-6361/201118743.
- ↑ Grundy, W. M.; Noll, K. S.; Buie, M.W; Benecchi, S.D.; . Stephens, D.C.; Levison, H.F (2009). "Mutual orbits and masses of six transneptunian binaries". Icarus. 200: 627–635. arXiv:0812.3126. Bibcode:2009Icar..200..627G. doi:10.1016/j.icarus.2008.12.008.
- ↑ Grundy, W. M.; Noll, K. S.; Nimmo, F.; Roe, H. G.; Buie, M. W.; Porter, S. B.; Benecchi, S. D.; Stephens, D. C.; Levison, H. F.; Stansberry, J. A. (2011). "Five new and three improved mutual orbits of transneptunian binaries" (pdf). Icarus. 213 (2): 678. arXiv:1103.2751. Bibcode:2011Icar..213..678G. doi:10.1016/j.icarus.2011.03.012.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 2001 XR254 at the JPL Small-Body Database