+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2008 TC4) Classification: Aten [NEO, PHA]          SPK-ID: 3430309 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .5544099305940819 1.4518e-07   a .78034337842771 2.5016e-09 au q .3477132601540519 1.1293e-07 au i 10.64771929932111 2.0033e-05 deg node 212.6047943942334 3.2953e-05 deg peri 324.2760333221131 3.0727e-05 deg M 193.1791570501715 4.1842e-05 deg tp 2459117.174208068739 (2020-Sep-24.67420807) 2.9568e-05 TDB period 251.7833752787009 0.69 1.2108e-06 3.315e-09 d yr n 1.429800516422156 6.8755e-09 deg/d Q 1.212973496701368 3.8886e-09 au   Orbit Determination Parameters    # obs. used (total)      151      data-arc span      4042 days (11.07 yr)      first obs. used      2008-10-06      last obs. used      2019-10-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47882      source      ORB      producer      Otto Matic      solution date      2019-Nov-01 07:28:44   Additional Information  Earth MOID = .00333252 au   Jupiter MOID = 3.76055 au   T_jup = 7.302  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 21.5   n/a MPO237381   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Feb-25 16:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin