+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160907 (2001 UJ87) Classification: Main-belt Asteroid          SPK-ID: 2160907 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1730203752882165 3.9441e-08   a 2.256910869070191 7.2604e-09 au q 1.866419303511612 9.0738e-08 au i 1.249798798517909 4.2232e-06 deg node 230.3430051205968 0.00021529 deg peri 2.563442602871789 0.00021575 deg M 39.11940508973559 1.4413e-05 deg tp 2459065.926428084668 (2020-Aug-04.42642808) 4.942e-05 TDB period 1238.425936651861 3.39 5.9759e-06 1.636e-08 d yr n .2906915862673837 1.4027e-09 deg/d Q 2.64740243462877 8.5166e-09 au   Orbit Determination Parameters    # obs. used (total)      446      data-arc span      9894 days (27.09 yr)      first obs. used      1993-04-21      last obs. used      2020-05-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56403      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 20:03:18   Additional Information  Earth MOID = .85411 au   Jupiter MOID = 2.34595 au   T_jup = 3.603  [ 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 16.94   n/a E2020-QM9   160907 (2001 UJ87)          Discovered 2001-Oct-18 by Spacewatch at Kitt Peak Reference: 20070828/Numbers.arc Last Updated: 2007-08-30 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 01:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin