+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   70455 (1999 TM20) Classification: Main-belt Asteroid          SPK-ID: 2070455 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1495098778642878 3.2208e-08   a 2.620267327527491 1.0223e-08 au q 2.228511479417072 8.4276e-08 au i 3.777021758578885 4.9081e-06 deg node 6.288909222391589 4.3898e-05 deg peri 295.2924781066455 4.6957e-05 deg M 10.44221971229908 1.5113e-05 deg tp 2458955.562681320300 (2020-Apr-16.06268132) 6.5098e-05 TDB period 1549.233321114479 4.24 9.0669e-06 2.482e-08 d yr n .232373003532499 1.36e-09 deg/d Q 3.01202317563791 1.1752e-08 au   Orbit Determination Parameters    # obs. used (total)      1021      data-arc span      8702 days (23.82 yr)      first obs. used      1997-01-10      last obs. used      2020-11-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51752      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:05:33   Additional Information  Earth MOID = 1.21639 au   Jupiter MOID = 2.21703 au   T_jup = 3.386  [ 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 15.4   n/a MPO436274   70455 (1999 TM20)          Discovered 1999-Oct-05 by Tucker, R. A. at Goodricke-Pigott Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-27 21:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin