+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1389586058710854 8.5909e-08   a 2.528293258128436 2.1128e-08 au q 2.176965151745645 2.229e-07 au i 8.077739170948815 8.791e-06 deg node 221.930340473853 3.5563e-05 deg peri 337.3300182027612 4.0994e-05 deg M 337.1841840499218 1.9838e-05 deg tp 2459293.562154086046 (2021-Mar-20.06215409) 8.138e-05 TDB period 1468.383841466855 4.02 1.8406e-05 5.039e-08 d yr n .2451675030967208 3.0731e-09 deg/d Q 2.879621364511228 2.4064e-08 au   Orbit Determination Parameters    # obs. used (total)      160      data-arc span      7233 days (19.80 yr)      first obs. used      2001-04-24      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .60061      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 08:58:17   Additional Information  Earth MOID = 1.17549 au   Jupiter MOID = 2.09431 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 ] 2021-Apr-20 10:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin