+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   150304 (1999 TO259) Classification: Main-belt Asteroid          SPK-ID: 2150304 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1478088400957942 4.2034e-08   a 2.773241881532237 2.1629e-08 au q 2.363332215717879 1.1639e-07 au i 16.21117483149248 5.4052e-06 deg node 197.7005541459007 1.5231e-05 deg peri 106.9073557339545 2.2984e-05 deg M 273.4270362272062 1.8589e-05 deg tp 2459606.157805703407 (2022-Jan-26.65780570) 8.9279e-05 TDB period 1686.863931752325 4.62 1.9734e-05 5.403e-08 d yr n .2134137752450665 2.4967e-09 deg/d Q 3.183151547346594 2.4826e-08 au   Orbit Determination Parameters    # obs. used (total)      591      data-arc span      8329 days (22.80 yr)      first obs. used      1998-05-26      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .59249      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:17:59   Additional Information  Earth MOID = 1.40724 au   Jupiter MOID = 2.22577 au   T_jup = 3.263  [ 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 15.16   n/a E2021B55   150304 (1999 TO259)          Discovered 1999-Oct-09 by LINEAR at Socorro Reference: 20070303/Numbers.arc Last Updated: 2007-03-07 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 20:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin