+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   259363 (2003 HJ2) Classification: Main-belt Asteroid          SPK-ID: 2259363 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .18108647208892 4.7948e-08   a 2.603889659387265 2.6201e-08 au q 2.132360467260006 1.2136e-07 au i 29.20719351398513 7.4133e-06 deg node 103.1126810207079 1.0144e-05 deg peri 49.37320880450714 4.2598e-05 deg M 70.67223054083333 3.6923e-05 deg tp 2458699.214250749485 (2019-Aug-03.71425075) 0.0001545 TDB period 1534.731094521167 4.20 2.3164e-05 6.342e-08 d yr n .2345687796938259 3.5404e-09 deg/d Q 3.075418851514525 3.0945e-08 au   Orbit Determination Parameters    # obs. used (total)      370      data-arc span      6824 days (18.68 yr)      first obs. used      2001-12-13      last obs. used      2020-08-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47149      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 23:10:39   Additional Information  Earth MOID = 1.21529 au   Jupiter MOID = 2.21425 au   T_jup = 3.213  [ 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 15.8   n/a MPO423002   259363 (2003 HJ2)          Discovered 2003-Apr-25 by LINEAR at Socorro Reference: 20110119/Numbers.arc Last Updated: 2011-01-25 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-22 23:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin