(131697) 2001 XH255

(131697) 2001 XH255
Discovery[1]
Discovered by Kleyna, J., Sheppard, S. S., Jewitt, D. C.
Discovery date 2001-12-11
Designations
MPC designation (131697) 2001 XH255
TNO
4:5 resonance[2][3]
Orbital characteristics[1]
Epoch November 30, 2008
Aphelion 37.363 AU (Q)
Perihelion 32.256 AU (q)
34.810 AU (a)
Eccentricity 0.07335
205.39 yr
301.70° (M)
Inclination 2.8632 °
323.08°
222.19°
Physical characteristics
Dimensions 100 km (assumed)[4]
Albedo 0.09 (assumed)
23.6[5]
8.2[1]

    (131697) 2001 XH255, provisionally known as 2001 XH255, is a trans-Neptunian object (TNO) that has a 4:5 resonance with Neptune.[2]

    It will come to perihelion in 2041.[1]

    Assuming a generic TNO albedo of 0.09, it is about 100 km in diameter.[4]

    Resonance

    According to the Deep Ecliptic Survey and Minor Planet Center, (131697) 2001 XH255 has a 4:5 resonance with Neptune.[2][3] It comes as close as 32.2 AU from the Sun and has a fairly low orbital eccentricity of 0.07 with an inclination of only 2.86 degrees.[1]

    The Neptune 4:5 resonance keeps it more than 7 AU from Neptune over a 14000-year period.[6]

    It has been observed 21 times over 5 oppositions and has an orbit quality code of 3.[1]

    The libration of 2001 XH255. Jupiter in red, Saturn in yellow, and Uranus in blue. Neptune is the white dot at 5 o'clock.

    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 131697 (2001 XH255)" (last observation: 2006-01-29). Retrieved 2009-02-01.
    2. 1 2 3 Marc W. Buie. "Orbit Fit and Astrometric record for 131697" (2006-01-29 using 19 observations). SwRI (Space Science Department). Retrieved 2009-02-01.
    3. 1 2 "MPEC 2009-A63 :Distant Minor Planets (2009 JAN. 29.0 TT)". Minor Planet Center. 2009-01-13. Retrieved 2009-02-01.
    4. 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 2009-02-01.
    5. ↑ "AstDys (131697) 2001XH255 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-04-18. Retrieved 2009-03-16.
    6. ↑ "MPEC 2006-H30 : 2001 XT254, 2001 XH255". Minor Planet Center. 2006-04-22. Retrieved 2009-02-01.

    External links

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