+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74896 (1999 TO121) Classification: Main-belt Asteroid          SPK-ID: 2074896 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .198922668571463 5.1185e-08   a 2.386936472261242 1.1645e-08 au q 1.912120699488482 1.1861e-07 au i 2.443521512483013 3.8935e-06 deg node 127.2916037188399 0.00010987 deg peri 275.0134457232299 0.00011033 deg M 197.0708755586176 1.2794e-05 deg tp 2459610.115415463035 (2022-Jan-30.61541546) 5.0877e-05 TDB period 1346.975565719984 3.69 9.8571e-06 2.699e-08 d yr n .267265427199916 1.9558e-09 deg/d Q 2.861752245034002 1.3962e-08 au   Orbit Determination Parameters    # obs. used (total)      536      data-arc span      8486 days (23.23 yr)      first obs. used      1997-02-01      last obs. used      2020-04-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55758      source      ORB      producer      Otto Matic      solution date      2020-May-20 14:09:15   Additional Information  Earth MOID = .922582 au   Jupiter MOID = 2.54454 au   T_jup = 3.506  [ 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 16.1   n/a MPO412637   74896 (1999 TO121)          Discovered 1999-Oct-04 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-09 00:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin