+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   175843 (1999 TH205) Classification: Main-belt Asteroid          SPK-ID: 2175843 [ 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 .1134045750037507 3.8131e-08   a 2.351665651215634 1.2842e-08 au q 2.084976007488606 9.215e-08 au i 7.438693459513867 4.9368e-06 deg node 24.70116690956718 3.232e-05 deg peri 30.25523184714218 4.0716e-05 deg M 298.7412737422515 2.3833e-05 deg tp 2459424.644069301297 (2021-Jul-29.14406930) 8.7732e-05 TDB period 1317.230538045352 3.61 1.0789e-05 2.954e-08 d yr n .2733006786604011 2.2386e-09 deg/d Q 2.618355294942662 1.4298e-08 au   Orbit Determination Parameters    # obs. used (total)      551      data-arc span      9591 days (26.26 yr)      first obs. used      1994-04-15      last obs. used      2020-07-18      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56253      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:07:03   Additional Information  Earth MOID = 1.0984 au   Jupiter MOID = 2.71171 au   T_jup = 3.537  [ 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 16.74   n/a E2021B55   175843 (1999 TH205)          Discovered 1999-Oct-13 by LINEAR at Socorro Reference: 20080221/Numbers.arc Last Updated: 2008-02-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 15:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin