+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   131697 (2001 XH255) Classification: TransNeptunian Object          SPK-ID: 2131697 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO99010 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0765033 n/a   a 35.0980721 n/a AU q 32.4129538 n/a AU i 2.85044 n/a deg node 323.17362 n/a deg peri 216.47625 n/a deg M 314.79444 n/a deg tp 2465937.5178544 (2039-May-29.01785440) n/a JED period 75949.2068582 207.94 n/a n/a d yr n 0.00474001 n/a deg/d Q 37.7831904 n/a AU   Orbit Determination Parameters    # obs. used (total)      19      first obs. used      2001-??-??      last obs. used      2006-01-29      # oppositions      4      planetary ephem.      DE403      condition code      3      fit RMS      0.13      data source      MPC:mpu      producer      MPCM   Additional Information  T_jup = 5.321   MPC Centaur   MPC critical-list numbered object  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 8.8 mag n/a MPC24003   131697 (2001 XH255)          Discovered 2001-Dec-11 by Kleyna, J., Sheppard, S. S., Jewitt, D. C. at Mauna Kea (568) Reference: 20060711/Numbers.arc Last Updated: 2006-07-17 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 06:11 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin