+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   357895 (2005 UH521) Classification: Main-belt Asteroid          SPK-ID: 2357895 [ 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 .04535984425268583 5.9107e-08   a 3.01384260462193 6.1108e-08 au q 2.87713517347417 1.9041e-07 au i 3.149313424873516 6.359e-06 deg node 112.1300410646536 0.00013689 deg peri 207.5378638912726 0.00016203 deg M 340.2892745771871 9.0203e-05 deg tp 2459105.135580026645 (2020-Sep-12.63558003) 0.00048016 TDB period 1911.081809601741 5.23 5.8123e-05 1.591e-07 d yr n .1883749812233428 5.7292e-09 deg/d Q 3.15055003576969 6.388e-08 au   Orbit Determination Parameters    # obs. used (total)      137      data-arc span      4976 days (13.62 yr)      first obs. used      2005-10-12      last obs. used      2019-05-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .61049      source      ORB      producer      Otto Matic      solution date      2019-Sep-24 06:43:15   Additional Information  Earth MOID = 1.86427 au   Jupiter MOID = 1.99597 au   T_jup = 3.245  [ 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 16.4   n/a MPO437512   357895 (2005 UH521)          Discovered 2005-Oct-26 by Becker, A. C. at Apache Point Reference: 20130327/Numbers.arc Last Updated: 2013-03-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-05 10:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin