+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   312489 (2008 WR108) Classification: Inner Main-belt Asteroid          SPK-ID: 2312489 [ 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 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07136940847352483 7.7366e-08   a 1.902223103253427 1.4032e-08 au q 1.766462565589557 1.4993e-07 au i 20.32648797498451 1.0024e-05 deg node 255.3593595119387 2.2e-05 deg peri 299.5248199231021 8.7482e-05 deg M 9.300729178706034 7.6599e-05 deg tp 2458975.742596049518 (2020-May-06.24259605) 0.00020397 TDB period 958.2759857774496 2.62 1.0603e-05 2.903e-08 d yr n .3756746546329572 4.1567e-09 deg/d Q 2.037983640917297 1.5033e-08 au   Orbit Determination Parameters    # obs. used (total)      205      data-arc span      6503 days (17.80 yr)      first obs. used      2002-07-09      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51937      source      ORB      producer      Otto Matic      solution date      2020-May-21 20:27:11   Additional Information  Earth MOID = .799122 au   Jupiter MOID = 3.03799 au   T_jup = 3.866  [ 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 17.0   n/a MPO450244   312489 (2008 WR108)          Discovered 2008-Nov-30 by CSS at Catalina Reference: 20120109/Numbers.arc Last Updated: 2012-01-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-21 11:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin