+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   30812 (1990 OZ4) Classification: Main-belt Asteroid          SPK-ID: 2030812 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO257079 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1987965 n/a   a 2.2707864 n/a AU q 1.8193620 n/a AU i 4.94744 n/a deg node 228.70677 n/a deg peri 57.21083 n/a deg M 243.30069 n/a deg tp 2456805.6619324 (2014-May-28.16193240) n/a JED period 1249.8642509 3.42 n/a n/a d yr n 0.28803128 n/a deg/d Q 2.7222108 n/a AU   Orbit Determination Parameters    # obs. used (total)      503      first obs. used      1976-??-??      last obs. used      2013-03-18      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.58      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.581  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.6 mag n/a PDS3 (MPO 18546)   30812 (1990 OZ4)          Discovered 1990-Jul-25 by Holt, H. E. at Palomar (675) Reference: 20011130/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 OZ4 = 1976 JX4 = 2000 HC14  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 12:49 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin