+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   21032 (1989 TN16) Classification: Main-belt Asteroid          SPK-ID: 2021032 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08194199951017719 6.3622e-08   a 2.22204313628221 1.4966e-08 AU q 2.039964478697381 1.4217e-07 AU i 2.29033504977856 6.3197e-06 deg node 190.5060749693111 0.0001254 deg peri 326.1182809984526 0.00013133 deg M 258.1938817492834 4.2137e-05 deg tp 2456742.635810527311 (2014-Mar-26.13581053) 0.00014366 JED period 1209.837816294159 3.31 1.2223e-05 3.346e-08 d yr n .2975605450181017 3.0062e-09 deg/d Q 2.40412179386704 1.6192e-08 AU   Orbit Determination Parameters    # obs. used (total)      1042      data-arc span      8512 days (23.30 yr)      first obs. used      1989-10-04      last obs. used      2013-01-23      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .53786      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:28:24   Additional Information  Earth MOID = 1.04943 AU   T_jup = 3.643  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.8 mag n/a PDS3 (MPO 8621)   21032 (1989 TN16)          Discovered 1989-Oct-04 by Debehogne, H. at La Silla (809) Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 TN16 = 1991 EP8 = 1998 KV64  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 14:26 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin