+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146876 (2002 BK21) Classification: Inner Main-belt Asteroid          SPK-ID: 2146876 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06143461526564593 6.2214e-08   a 1.895057552129055 8.7782e-09 au q 1.778635420507749 1.1915e-07 au i 21.99938198794037 7.8055e-06 deg node 34.57919299415005 1.3841e-05 deg peri 120.8029107296133 5.2468e-05 deg M 354.1779589009894 5.2328e-05 deg tp 2459015.910076644932 (2020-Jun-15.41007664) 0.00013854 TDB period 952.8664428559614 2.61 6.6208e-06 1.813e-08 d yr n .3778074070076354 2.6251e-09 deg/d Q 2.01147968375036 9.3175e-09 au   Orbit Determination Parameters    # obs. used (total)      459      data-arc span      7763 days (21.25 yr)      first obs. used      1998-10-29      last obs. used      2020-01-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59564      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 08:40:00   Additional Information  Earth MOID = .815997 au   Jupiter MOID = 2.99042 au   T_jup = 3.863  [ 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 16.5   n/a MPO345205   146876 (2002 BK21)          Discovered 2002-Jan-25 by LINEAR at Socorro Reference: 20070106/Numbers.arc Last Updated: 2007-01-09 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-13 12:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin