+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   12921 (1998 WZ5) Classification: Jupiter Trojan          SPK-ID: 2012921 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256960 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0937435 n/a   a 5.2415483 n/a AU q 4.7501872 n/a AU i 12.79872 n/a deg node 160.22865 n/a deg peri 273.48685 n/a deg M 65.19961 n/a deg tp 2455606.6648486 (2011-Feb-14.16484860) n/a JED period 4383.1650908 12.00 n/a n/a d yr n 0.08213243 n/a deg/d Q 5.7329094 n/a AU   Orbit Determination Parameters    # obs. used (total)      586      first obs. used      1986-??-??      last obs. used      2013-03-21      # oppositions      17      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 2.942   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 10.7 mag n/a PDS3 (MPC 37097)   12921 (1998 WZ5)          Discovered 1998-Nov-20 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905) Reference: 19991222/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1998 WZ5 = 1986 WH3 = 1996 RA32  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 10:07 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin