+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   30815 (1990 QH2) Classification: Main-belt Asteroid          SPK-ID: 2030815 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1733581667458449 6.0369e-08   a 2.318926925126538 1.8082e-08 AU q 1.916922004569022 1.405e-07 AU i 4.555879706554658 7.0778e-06 deg node 356.3946065855077 9.0051e-05 deg peri 16.74411858632053 9.2825e-05 deg M 125.7113885106966 2.4999e-05 deg tp 2455950.097135183442 (2012-Jan-23.59713518) 8.7483e-05 JED period 1289.819747080148 3.53 1.5086e-05 4.13e-08 d yr n .279108767573885 3.2645e-09 deg/d Q 2.720931845684054 2.1216e-08 AU   Orbit Determination Parameters    # obs. used (total)      705      data-arc span      8264 days (22.63 yr)      first obs. used      1990-08-22      last obs. used      2013-04-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .57993      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:55:57   Additional Information  Earth MOID = .917067 AU   T_jup = 3.555  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.5 mag n/a PDS3 (MPO 18547)   30815 (1990 QH2)          Discovered 1990-Aug-22 by Holt, H. E. at Palomar (675) Reference: 20011130/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 02:20 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin