+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74631 (1999 RS46) Classification: Main-belt Asteroid          SPK-ID: 2074631 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2330100435313757 3.9806e-08   a 2.226328311429613 8.1982e-09 au q 1.707571454668265 9.0098e-08 au i 6.656353973235329 3.8828e-06 deg node 134.7942353908026 3.9199e-05 deg peri 224.3480722897322 4.0317e-05 deg M 65.5962128651171 7.7906e-06 deg tp 2458779.415392804399 (2019-Oct-22.91539280) 2.637e-05 TDB period 1213.339232770573 3.32 6.702e-06 1.835e-08 d yr n .2967018540873897 1.6389e-09 deg/d Q 2.745085168190962 1.0108e-08 au   Orbit Determination Parameters    # obs. used (total)      601      data-arc span      7495 days (20.52 yr)      first obs. used      1999-07-13      last obs. used      2020-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52743      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 17:19:42   Additional Information  Earth MOID = .710738 au   Jupiter MOID = 2.71098 au   T_jup = 3.601  [ 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 16.5   n/a MPO436304   74631 (1999 RS46)          Discovered 1999-Sep-07 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-09 15:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin