+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   390855 (2004 RR217) Classification: Main-belt Asteroid          SPK-ID: 2390855 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1711867708571564 9.9264e-08   a 2.523591339114669 1.5188e-08 au q 2.091585886808542 2.5073e-07 au i 11.869106623756 4.7411e-06 deg node 296.1531508593748 3.6481e-05 deg peri 65.97237605753328 3.8976e-05 deg M 335.9187379864494 1.2053e-05 deg tp 2459098.449835620064 (2020-Sep-05.94983562) 4.8922e-05 TDB period 1464.289571010899 4.01 1.3219e-05 3.619e-08 d yr n .245853010993903 2.2195e-09 deg/d Q 2.955596791420796 1.7788e-08 au   Orbit Determination Parameters    # obs. used (total)      453      data-arc span      5906 days (16.17 yr)      first obs. used      2004-09-11      last obs. used      2020-11-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49547      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 06:51:15   Additional Information  Earth MOID = 1.11887 au   Jupiter MOID = 2.56945 au   T_jup = 3.405  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.4   n/a MPO437600   390855 (2004 RR217)          Discovered 2004-Sep-11 by LINEAR at Socorro Reference: Last Updated: 2014-04-17 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-25 07:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin