| Minorplanet: | yes |
| Background: |
|
| Discoverer: | Sheppard, S. S., Kleyna, J., Jewitt, D. C. |
| Discovered: | 9 December 2001 |
| Mp Category: | SDO[1] 3:7 resonance[2] [3] |
| Orbit Ref: | [4] |
| Epoch: | 13 January 2016 (JD 2457400.5) |
| Aphelion: | 70.889abbr=onNaNabbr=on (Q) |
| Perihelion: | 35.892AU (q) |
| Semimajor: | 53.391AU (a) |
| Eccentricity: | 0.32774 (e) |
| Period: | 390.13 yr (142494 d) |
| Inclination: | 0.51687° (i) |
| Asc Node: | 359.55° (Ω) |
| Mean Anomaly: | 359.98° (M) |
| Arg Peri: | 133.36° (ω) |
| Dimensions: | 146 km (assumed)[5] |
| Albedo: | 0.09 (assumed) |
| Abs Magnitude: | 7.4 |
| Mean Motion: | / day (n) |
| Observation Arc: | 4113 days (11.26 yr) |
| Uncertainty: | 3 |
| Moid: | 34.907AU |
| Jupiter Moid: | 30.5705AU |
, provisionally known as 2001 XT254, is a Kuiper belt object (KBO)[1] that has a 3:7 resonance with Neptune.[2]
It will come to perihelion in January 2016.[4]
Assuming a generic TNO albedo of 0.09, it is about 146 km in diameter.[5]
Simulations by Emel’yanenko and Kiseleva in 2007 show that 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.[4]
has a similar resonant behavior.