+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1728157668412465 3.9429e-08   a 2.256364430849837 7.3212e-09 au q 1.86642908145921 9.0741e-08 au i 1.249998436748229 4.2235e-06 deg node 230.3514236167034 0.00021526 deg peri 2.524617428110962 0.00021571 deg M 340.9975625922896 1.4356e-05 deg tp 2459065.846014405827 (2020-Aug-04.34601441) 4.9448e-05 TDB period 1237.97619649322 3.39 6.0253e-06 1.65e-08 d yr n .2907971906243123 1.4153e-09 deg/d Q 2.646299780240464 8.5864e-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.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56405      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 12:23:09   Additional Information  Earth MOID = .855443 au   Jupiter MOID = 2.34811 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 16.9   n/a MPO454066   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 ] 2020-Nov-30 13:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin