| Discovery[1] | |
|---|---|
| Discovered by | Sheppard, S. S., Kleyna, J., Jewitt, D. C. |
| Discovery date | 9 December 2001 |
| Designations | |
| (131696) 2001 XT254 | |
| SDO[2] 3:7 resonance[3][4] | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 4113 days (11.26 yr) |
| Aphelion | 70.889 AU (10.6048 Tm) (Q) |
| Perihelion | 35.892 AU (5.3694 Tm) (q) |
| 53.391 AU (7.9872 Tm) (a) | |
| Eccentricity | 0.32774 (e) |
| 390.13 yr (142494 d) | |
| 359.98° (M) | |
| 0° 0m 9.095s / day (n) | |
| Inclination | 0.51687° (i) |
| 359.55° (Ω) | |
| 133.36° (ω) | |
| Earth MOID | 34.907 AU (5.2220 Tm) |
| Jupiter MOID | 30.5705 AU (4.57328 Tm) |
| Physical characteristics | |
| Dimensions | 146 km (assumed)[5] |
| 0.09 (assumed) | |
| 7.4[1] | |
(131696) 2001 XT254, provisionally known as 2001 XT254, is a Kuiper belt object (KBO)[2] that has a 3:7 resonance with Neptune.[3]
It will come to perihelion in January 2016.[1]
Assuming a generic TNO albedo of 0.09, it is about 146 km in diameter.[5]
Resonance
Simulations by Emel’yanenko and Kiseleva in 2007 show that (131696) 2001 XT254 is librating in a 3:7 resonance with Neptune.[6] This libration can be stable for less than 100 million to billions of years.[6]
It has been observed 22 times over 4 oppositions.[1]
The trefoil libration of 2001 XT254. Jupiter in red, Saturn in yellow, and Uranus in blue. Neptune is the white dot at 5 o'clock.
The orbital period of 2001 XT254 around the 3:7 (2.333..) resonance of Neptune.
See also
(95625) 2002 GX32 has a similar resonant behavior.
References
- 1 2 3 4 5 "JPL Small-Body Database Browser: 131696 (2001 XT254)" (2006-01-29 last obs). Retrieved 7 April 2016.
- 1 2 "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2009-01-30.
- 1 2 Marc W. Buie. "Orbit Fit and Astrometric record for 131696" (2013-03-24 using 28 observations). SwRI (Space Science Department). Retrieved 2009-01-30.
- ↑ "MPEC 2009-A63 :Distant Minor Planets (2009 JAN. 29.0 TT)". Minor Planet Center. 2009-01-13. Retrieved 2009-01-30.
- 1 2 Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 13 February 2009. Retrieved 2009-01-30.
- 1 2 Emel’yanenko, V. V; Kiseleva, E. L. (2008). "Resonant motion of trans-Neptunian objects in high-eccentricity orbits". Astronomy Letters. 34 (4): 271–279. Bibcode:2008AstL...34..271E. doi:10.1134/S1063773708040075. S2CID 122634598.
External links
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