+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   39161 (2000 WH117) Classification: Main-belt Asteroid          SPK-ID: 2039161 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2095368082472643 3.7166e-08   a 2.396284309510189 8.8134e-09 au q 1.894174543642425 8.8771e-08 au i 4.972118695218718 4.4067e-06 deg node 345.5129538776014 3.4123e-05 deg peri 325.1695784171039 3.5078e-05 deg M 209.1486524238 9.0679e-06 deg tp 2459568.244108661545 (2021-Dec-19.74410866) 3.5783e-05 TDB period 1354.895944929582 3.71 7.4748e-06 2.046e-08 d yr n .2657030610706495 1.4659e-09 deg/d Q 2.898394075377953 1.066e-08 au   Orbit Determination Parameters    # obs. used (total)      1337      data-arc span      14032 days (38.42 yr)      first obs. used      1981-11-24      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54442      source      ORB      producer      Otto Matic      solution date      2020-May-20 08:40:44   Additional Information  Earth MOID = .88257 au   Jupiter MOID = 2.38775 au   T_jup = 3.494  [ hide covariance matrix ] Orbital Elements at Epoch 2456983.5 (2014-Nov-22.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2106986508372112 3.7268e-08   q 1.890924945993326 8.9116e-08 au tp 2456858.071542523627 (2014-Jul-19.57154252) 2.981e-05 TDB node 345.5628362079178 3.4081e-05 deg peri 325.0466300732574 3.5024e-05 deg i 4.977318540625148 4.4094e-06 deg   Orbit Determination Parameters    # obs. used (total)      1337      data-arc span      14032 days (38.42 yr)      first obs. used      1981-11-24      last obs. used      2020-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54442      source      ORB      producer      Otto Matic      solution date      2020-May-20 08:40:44   Additional Information  Jupiter MOID = 2.38775 au   T_jup = 3.494  Orbit Covariance (6×6)   e q tp node peri i e 1.388917124407126E-15 -3.311237215369043E-15 4.474502211631879E-13 -9.547036152138831E-16 1.070463656042157E-13 -1.631211616212534E-15 q -3.311237215369043E-15 7.941715642058087E-15 -1.037993934260604E-12 2.503750609817643E-15 -2.469823228617119E-13 3.977080449117077E-15 tp 4.474502211631879E-13 -1.037993934260604E-12 8.886544151323016E-10 1.362317629768857E-12 2.463291244734667E-10 -1.535715457654377E-12 node -9.547036152138831E-16 2.503750609817643E-15 1.362317629768857E-12 1.161545624054401E-9 -1.156234191757698E-9 -7.961207989991625E-12 peri 1.070463656042157E-13 -2.469823228617119E-13 2.463291244734667E-10 -1.156234191757698E-9 1.226697012946307E-9 7.530638698320787E-12 i -1.631211616212534E-15 3.977080449117077E-15 -1.535715457654377E-12 -7.961207989991625E-12 7.530638698320787E-12 1.94425905712196E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.9   n/a MPO412458   39161 (2000 WH117)          Discovered 2000-Nov-20 by LINEAR at Socorro Reference: 20020328/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2000 WH117 = 1981 WJ5 = 1998 BL22  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-24 12:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin