+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   13539 (1991 TY) Classification: Main-belt Asteroid          SPK-ID: 2013539 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2935923026864243 3.9348e-08   a 2.400599839253244 8.2723e-09 au q 1.695802204618224 9.5687e-08 au i 23.15142659498153 3.9776e-06 deg node 126.6702314462422 1.0528e-05 deg peri 240.3129615238645 1.1587e-05 deg M 254.4703116775751 6.3808e-06 deg tp 2459398.744916272045 (2021-Jul-03.24491627) 2.5036e-05 TDB period 1358.557692503585 3.72 7.0223e-06 1.923e-08 d yr n .264986906324591 1.3697e-09 deg/d Q 3.105397473888264 1.0701e-08 au   Orbit Determination Parameters    # obs. used (total)      1259      data-arc span      16003 days (43.81 yr)      first obs. used      1976-08-24      last obs. used      2020-06-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50599      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:37:24   Additional Information  Earth MOID = .784592 au   Jupiter MOID = 2.56474 au   T_jup = 3.362  [ 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 14.7   n/a MPO435829   13539 (1991 TY)          Discovered 1991-Oct-02 by McNaught, R. H. at Siding Spring Reference: 20000222/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-27 11:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin