+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   137315 (1999 TB20) Classification: Main-belt Asteroid          SPK-ID: 2137315 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO229686 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1482620 n/a   a 2.3460381 n/a AU q 1.9982098 n/a AU i 5.63213 n/a deg node 59.55639 n/a deg peri 329.15432 n/a deg M 270.58159 n/a deg tp 2456726.5059085 (2014-Mar-10.00590850) n/a JED period 1312.5051885 3.59 n/a n/a d yr n 0.27428463 n/a deg/d Q 2.6938664 n/a AU   Orbit Determination Parameters    # obs. used (total)      148      first obs. used      1999-??-??      last obs. used      2012-04-28      # oppositions      7      planetary ephem.      DE403      condition code      1      fit RMS      0.55      data source      MPC:mpu      producer      MPCLINUX   Additional Information  T_jup = 3.540  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.7 mag n/a MPO229686   137315 (1999 TB20)          Discovered 1999-Oct-15 by BAO Schmidt CCD Asteroid Program at Xinglong (327) Reference: 20061205/Numbers.arc Last Updated: 2006-12-13 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-26 05:18 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin