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(131696) 2001 XT254, provisionally known as 2001 XT254, is a Kuiper belt object (KBO)[2] that has a 3:7 resonance with Neptune.[3]

(131696) 2001 XT254
Discovery[1]
Discovered bySheppard, S. S., Kleyna, J., Jewitt, D. C.
Discovery date9 December 2001
Designations
MPC designation
(131696) 2001 XT254
Minor planet category
SDO[2]
3:7 resonance[3][4]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc4113 days (11.26 yr)
Aphelion70.889 AU (10.6048 Tm) (Q)
Perihelion35.892 AU (5.3694 Tm) (q)
Semi-major axis
53.391 AU (7.9872 Tm) (a)
Eccentricity0.32774 (e)
Orbital period (sidereal)
390.13 yr (142494 d)
Mean anomaly
359.98° (M)
Mean motion
0° 0m 9.095s / day (n)
Inclination0.51687° (i)
Longitude of ascending node
359.55° (Ω)
Argument of perihelion
133.36° (ω)
Earth MOID34.907 AU (5.2220 Tm)
Jupiter MOID30.5705 AU (4.57328 Tm)
Physical characteristics
Dimensions146 km (assumed)[5]
Geometric albedo
0.09 (assumed)
Absolute magnitude (H)
7.4[1]

    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 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.
    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. "JPL Small-Body Database Browser: 131696 (2001 XT254)" (2006-01-29 last obs). Retrieved 7 April 2016.
    2. "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2009-01-30.
    3. Marc W. Buie. "Orbit Fit and Astrometric record for 131696" (2013-03-24 using 28 observations). SwRI (Space Science Department). Retrieved 2009-01-30.
    4. "MPEC 2009-A63 :Distant Minor Planets (2009 JAN. 29.0 TT)". Minor Planet Center. 2009-01-13. Retrieved 2009-01-30.
    5. 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.
    6. 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.



    На других языках

    - [en] (131696) 2001 XT254

    [ru] (131696) 2001 XT254

    (131696) 2001 XT254 является объектом пояса Койпера[3], имеет резонанс 3:7 с планетой Нептун[4]. Объект пройдёт перигелий в 2015 году[1]. Исходя из предположительного альбедо, его диаметр оценён в 133 км[6].


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