+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120276 (2004 HU9) Classification: Main-belt Asteroid          SPK-ID: 2120276 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .133290682445815 5.1751e-08   a 2.29125207013297 1.496e-08 au q 1.98584951804956 1.1996e-07 au i 4.586260562448146 5.2029e-06 deg node 14.62384478452204 6.0002e-05 deg peri 160.5746383456867 6.4725e-05 deg M 263.2161413272045 3.0861e-05 deg tp 2459341.071392161103 (2021-May-06.57139216) 0.0001109 TDB period 1266.799059877324 3.47 1.2407e-05 3.397e-08 d yr n .2841808234645061 2.7832e-09 deg/d Q 2.59665462221638 1.6954e-08 au   Orbit Determination Parameters    # obs. used (total)      341      data-arc span      8784 days (24.05 yr)      first obs. used      1995-10-15      last obs. used      2019-11-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56897      source      ORB      producer      Otto Matic      solution date      2019-Dec-04 11:13:57   Additional Information  Earth MOID = .990781 au   Jupiter MOID = 2.36478 au   T_jup = 3.582  [ 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 16.7   n/a MPO280589   120276 (2004 HU9)          Discovered 2004-Apr-17 by LINEAR at Socorro Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-24 04:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin