+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   150456 (2000 HX55) Classification: Main-belt Asteroid          SPK-ID: 2150456 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1563548200369335 4.6717e-08   a 2.353559765739146 1.1044e-08 au q 1.985569352120835 1.1033e-07 au i 2.650516478261986 5.2939e-06 deg node 17.61380885461904 0.00010229 deg peri 130.4222608596097 0.00010346 deg M 310.3485346943569 1.7185e-05 deg tp 2459382.392940005154 (2021-Jun-16.89294001) 6.3673e-05 TDB period 1318.822274403513 3.61 9.2824e-06 2.541e-08 d yr n .2729708217605162 1.9213e-09 deg/d Q 2.721550179357458 1.277e-08 au   Orbit Determination Parameters    # obs. used (total)      460      data-arc span      8122 days (22.24 yr)      first obs. used      1998-10-19      last obs. used      2021-01-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56544      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 10:39:21   Additional Information  Earth MOID = .998025 au   Jupiter MOID = 2.2788 au   T_jup = 3.538  [ 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 16.9   n/a MPO432956   150456 (2000 HX55)          Discovered 2000-Apr-24 by LONEOS at Anderson Mesa Reference: 20070303/Numbers.arc Last Updated: 2007-03-07 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-12 16:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin