+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70640 (1999 TR239) Classification: Main-belt Asteroid          SPK-ID: 2070640 [ 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 .1752717465285696 9.0925e-08   a 2.556526907907222 1.3932e-08 au q 2.10843997171104 2.3862e-07 au i 7.609714570504639 5.5333e-06 deg node 102.9678598678786 5.0455e-05 deg peri 14.27851169629495 5.6612e-05 deg M 304.5375573012362 2.1555e-05 deg tp 2459230.522580525701 (2021-Jan-16.02258053) 8.8851e-05 TDB period 1493.048718373493 4.09 1.2204e-05 3.341e-08 d yr n .2411173832238904 1.9709e-09 deg/d Q 3.004613844103404 1.6373e-08 au   Orbit Determination Parameters    # obs. used (total)      809      data-arc span      7712 days (21.11 yr)      first obs. used      1999-10-04      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56159      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:54:54   Additional Information  Earth MOID = 1.12569 au   Jupiter MOID = 2.09933 au   T_jup = 3.403  [ 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 15.2   n/a MPO417316   70640 (1999 TR239)          Discovered 1999-Oct-04 by CSS at Catalina Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-27 01:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin