+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   442617 (2012 RR20) Classification: Main-belt Asteroid          SPK-ID: 2442617 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1046651308143413 6.6164e-08   a 2.283366947803906 1.8878e-08 au q 2.044378047514868 1.4611e-07 au i 4.927111254198268 6.0583e-06 deg node 282.5470062626737 9.9866e-05 deg peri 27.64115184176057 0.00011147 deg M 116.1736357299558 4.5256e-05 deg tp 2458593.806648639749 (2019-Apr-20.30664864) 0.00015834 TDB period 1260.265339633664 3.45 1.5629e-05 4.279e-08 d yr n .2856541306647737 3.5424e-09 deg/d Q 2.522355848092946 2.0853e-08 au   Orbit Determination Parameters    # obs. used (total)      137      data-arc span      7263 days (19.89 yr)      first obs. used      2000-01-08      last obs. used      2019-11-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49302      source      ORB      producer      Otto Matic      solution date      2019-Dec-14 22:53:03   Additional Information  Earth MOID = 1.03113 au   Jupiter MOID = 2.67832 au   T_jup = 3.592  [ 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 17.4   n/a MPO450446   442617 (2012 RR20)          Discovered 2009-Nov-17 by Spacewatch at Kitt Peak Reference: Last Updated: 2015-09-02 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Dec-01 10:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin