+ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .162411925014851 4.5842e-08   a 2.3340535979653 1.0141e-08 au q 1.954975460031916 1.1073e-07 au i 6.589262229674053 4.4783e-06 deg node 270.2007307999208 3.9658e-05 deg peri 87.97919922651802 4.1891e-05 deg M 274.8767370635248 1.4557e-05 deg tp 2459308.471427315305 (2021-Apr-03.97142732) 5.3484e-05 TDB period 1302.46080811362 3.57 8.4887e-06 2.324e-08 d yr n .2763998715027711 1.8014e-09 deg/d Q 2.713131735898684 1.1788e-08 au   Orbit Determination Parameters    # obs. used (total)      742      data-arc span      7650 days (20.94 yr)      first obs. used      1999-09-06      last obs. used      2020-08-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58252      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:01:19   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 ] 2021-Jan-23 22:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin