+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   351440 (2005 HX2) Classification: Main-belt Asteroid          SPK-ID: 2351440 [ 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 .139085661502032 8.5899e-08   a 2.528548215704791 2.1345e-08 au q 2.176863414483708 2.2298e-07 au i 8.07767821400871 8.8165e-06 deg node 221.9378382117402 3.5616e-05 deg peri 337.3158069695718 4.106e-05 deg M 288.1716997286372 1.9762e-05 deg tp 2459293.520749396461 (2021-Mar-20.02074940) 8.2084e-05 TDB period 1468.605958712664 4.02 1.8596e-05 5.091e-08 d yr n .2451304230820126 3.1039e-09 deg/d Q 2.880233016925875 2.4314e-08 au   Orbit Determination Parameters    # obs. used (total)      156      data-arc span      6822 days (18.68 yr)      first obs. used      2001-04-24      last obs. used      2019-12-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60113      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 16:43:45   Additional Information  Earth MOID = 1.17621 au   Jupiter MOID = 2.09484 au   T_jup = 3.425  [ 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 17.1   n/a MPO455543   351440 (2005 HX2)          Discovered 2005-Apr-17 by Spacewatch at Kitt Peak Reference: 20130127/Numbers.arc Last Updated: 2013-01-31 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-26 16:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin