+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70289 (1999 RW118) Classification: Main-belt Asteroid          SPK-ID: 2070289 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1624119423883289 6.104e-08   a 2.334053599163486 1.0413e-08 au q 1.954975420484874 1.4402e-07 au i 6.589262966726257 4.49e-06 deg node 270.2007850054027 4.7725e-05 deg peri 87.97914487906299 4.9482e-05 deg M 274.8767359345401 1.4649e-05 deg tp 2459308.471431637057 (2021-Apr-03.97143164) 5.3862e-05 TDB period 1302.460809116547 3.57 8.7157e-06 2.386e-08 d yr n .2763998712899364 1.8496e-09 deg/d Q 2.713131777842098 1.2104e-08 au   Orbit Determination Parameters    # obs. used (total)      704      data-arc span      7168 days (19.62 yr)      first obs. used      1999-09-06      last obs. used      2019-04-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5827      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 16:07:50   Additional Information  Earth MOID = .96448 au   Jupiter MOID = 2.76809 au   T_jup = 3.542  [ 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 15.8   n/a MPO432255   70289 (1999 RW118)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-24 15:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin