+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102486 (1999 TY258) Classification: Main-belt Asteroid          SPK-ID: 2102486 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1276091110858303 4.8391e-08   a 2.583810440571709 1.3113e-08 au q 2.254092687036066 1.2506e-07 au i 2.512586825903 4.9588e-06 deg node 198.5634974648556 0.00010172 deg peri 221.5914705492461 0.00010318 deg M 2.672277997764889 1.578e-05 deg tp 2459189.239218408421 (2020-Dec-05.73921841) 6.652e-05 TDB period 1517.013340812225 4.15 1.1548e-05 3.162e-08 d yr n .2373083942737459 1.8065e-09 deg/d Q 2.913528194107353 1.4786e-08 au   Orbit Determination Parameters    # obs. used (total)      394      data-arc span      10161 days (27.82 yr)      first obs. used      1993-03-22      last obs. used      2021-01-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54847      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:31:35   Additional Information  Earth MOID = 1.26663 au   Jupiter MOID = 2.392 au   T_jup = 3.410  [ 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 16.68   n/a E2021B55   102486 (1999 TY258)          Discovered 1999-Oct-09 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-09 02:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin