+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   30818 (1990 RH2) Classification: Main-belt Asteroid          SPK-ID: 2030818 [ 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 0.1106963 n/a   a 2.3337915 n/a AU q 2.0754494 n/a AU i 6.62809 n/a deg node 343.99913 n/a deg peri 39.42501 n/a deg M 99.12794 n/a deg tp 2456041.9207990 (2012-Apr-24.42079900) n/a JED period 1302.2414505 3.57 n/a n/a d yr n 0.27644643 n/a deg/d Q 2.5921336 n/a AU   Orbit Determination Parameters    # obs. used (total)      474      first obs. used      1990-??-??      last obs. used      2013-03-03      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.552  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.6 mag n/a PDS3 (MPO 18548)   30818 (1990 RH2)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar (675) Reference: 20011130/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 RH2 = 1992 EA2  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 00:43 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin