+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   13790 (1998 UF31) Classification: Jupiter Trojan          SPK-ID: 2013790 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256966 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1130063 n/a   a 5.2598371 n/a AU q 4.6654424 n/a AU i 7.97601 n/a deg node 67.24398 n/a deg peri 54.69695 n/a deg M 24.52146 n/a deg tp 2456100.3760043 (2012-Jun-21.87600430) n/a JED period 4406.1258368 12.06 n/a n/a d yr n 0.08170443 n/a deg/d Q 5.8542318 n/a AU   Orbit Determination Parameters    # obs. used (total)      465      first obs. used      1991-??-??      last obs. used      2013-03-16      # oppositions      16      planetary ephem.      DE403      condition code      0      fit RMS      0.54      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 2.968   MPC Jupiter Trojan  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.2 mag n/a PDS3 (MPC 38397)   13790 (1998 UF31)          Discovered 1998-Oct-17 by Beijing Schmidt CCD Asteroid Program at Xinglong (327) Reference: 20000222/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1998 UF31 = 1997 TQ29 = 1998 UH32 = 2000 AJ27  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 16:52 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin