+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   118304 (1998 UQ20) Classification: Main-belt Asteroid          SPK-ID: 2118304 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2586425661724736 8.8678e-08   a 2.302934860975787 6.0875e-09 au q 1.707297878804961 2.0338e-07 au i .9968333953032337 4.7972e-06 deg node 96.07906435179524 0.00027365 deg peri 265.0738149772707 0.00027394 deg M 89.58044157308819 1.4328e-05 deg tp 2458682.862619335539 (2019-Jul-18.36261934) 5.0365e-05 TDB period 1276.500260895778 3.49 5.0614e-06 1.386e-08 d yr n .2820210939458578 1.1182e-09 deg/d Q 2.898571843146613 7.662e-09 au   Orbit Determination Parameters    # obs. used (total)      699      data-arc span      7776 days (21.29 yr)      first obs. used      1998-10-18      last obs. used      2020-02-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52849      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 05:56:38   Additional Information  Earth MOID = .704717 au   Jupiter MOID = 2.55611 au   T_jup = 3.545  [ 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 16.2   n/a MPO502793   118304 (1998 UQ20)          Discovered 1998-Oct-28 by Korlevic, K. at Visnjan Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-29 17:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin