+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2015 BK4) Classification: Apollo [NEO]          SPK-ID: 3704157 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 8 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4807491953468096 0.00042597   a 1.66790755714249 0.0012136 au q .8660623411333752 8.0325e-05 au i .7498808676264112 0.00074461 deg node 258.2877344503181 0.010661 deg peri 278.4870219798865 0.0081076 deg M 156.0483317474775 0.95815 deg tp 2458659.453952342660 (2019-Jun-24.95395234) 1.7218 TDB period 786.78557970952 2.15 0.85872 0.002351 d yr n .4575579538874002 0.00049939 deg/d Q 2.469752773151606 0.001797 au   Orbit Determination Parameters    # obs. used (total)      51      data-arc span      10 days      first obs. used      2015-01-13      last obs. used      2015-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      7      norm. resid. RMS      .3591      source      ORB      producer      Otto Matic      solution date      2017-Apr-06 08:36:15   Additional Information  Earth MOID = .00573299 au   Jupiter MOID = 2.49583 au   T_jup = 4.113  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 24.9   n/a MPO324255   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-15 23:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin