+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102418 (1999 TN187) Classification: Main-belt Asteroid          SPK-ID: 2102418 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1575473027229609 4.0586e-08   a 2.531551918014544 1.3747e-08 au q 2.132712741628214 1.0181e-07 au i 9.83734279661191 7.8888e-06 deg node 309.7840351627655 5.9531e-05 deg peri 150.4924308399266 0.00010458 deg M 34.44307115554586 8.3875e-05 deg tp 2459059.740390703284 (2020-Jul-29.24039070) 0.00034249 TDB period 1471.22360598958 4.03 1.1984e-05 3.281e-08 d yr n .2446942793293855 1.9932e-09 deg/d Q 2.930391094400873 1.5913e-08 au   Orbit Determination Parameters    # obs. used (total)      595      data-arc span      7767 days (21.26 yr)      first obs. used      1999-10-12      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51467      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:31:23   Additional Information  Earth MOID = 1.15506 au   Jupiter MOID = 2.21714 au   T_jup = 3.413  [ 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 15.6   n/a MPO502730   102418 (1999 TN187)          Discovered 1999-Oct-12 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-05 02:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin