+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   243861 (2000 WJ131) Classification: Main-belt Asteroid          SPK-ID: 2243861 [ 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 9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2569003170828708 5.9931e-08   a 2.555314916069169 2.0722e-08 au q 1.89885370388441 1.553e-07 au i 6.92765835521206 9.2248e-06 deg node 70.59130217132585 0.00011708 deg peri 14.54939318579638 0.00012544 deg M 263.7531193643869 4.7128e-05 deg tp 2459399.386404389039 (2021-Jul-03.88640439) 0.00019873 TDB period 1491.987113054756 4.08 1.8149e-05 4.969e-08 d yr n .2412889473709468 2.935e-09 deg/d Q 3.211776128253928 2.6045e-08 au   Orbit Determination Parameters    # obs. used (total)      166      data-arc span      6372 days (17.45 yr)      first obs. used      2000-11-01      last obs. used      2018-04-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .67286      source      ORB      producer      Otto Matic      solution date      2019-Jul-13 14:17:02   Additional Information  Earth MOID = .915844 au   Jupiter MOID = 2.04281 au   T_jup = 3.381  [ 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 16.7   n/a MPO446288   243861 (2000 WJ131)          Discovered 2000-Nov-20 by LONEOS at Anderson Mesa Reference: 20100726/Numbers.arc Last Updated: 2010-07-28 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-16 15:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin