+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70609 (1999 TF198) Classification: Main-belt Asteroid          SPK-ID: 2070609 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2244617727933326 4.8101e-08   a 2.664125644522374 1.0465e-08 au q 2.066131279408702 1.3003e-07 au i 3.392579258052672 5.1101e-06 deg node 330.9124531190142 7.1322e-05 deg peri 13.61229941856427 7.1878e-05 deg M 307.0764611270083 9.4045e-06 deg tp 2459233.994608724370 (2021-Jan-19.49460872) 4.2226e-05 TDB period 1588.292486307455 4.35 9.3582e-06 2.562e-08 d yr n .2266585047171926 1.3355e-09 deg/d Q 3.262120009636046 1.2814e-08 au   Orbit Determination Parameters    # obs. used (total)      645      data-arc span      10911 days (29.87 yr)      first obs. used      1990-09-24      last obs. used      2020-08-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59951      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 21:59:56   Additional Information  Earth MOID = 1.05879 au   Jupiter MOID = 2.15534 au   T_jup = 3.345  [ 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 15.6   n/a MPO436275   70609 (1999 TF198)          Discovered 1999-Oct-12 by LINEAR at Socorro Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-27 20:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin