+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103034 (1999 XD117) Classification: Main-belt Asteroid          SPK-ID: 2103034 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2184212747220196 6.1817e-08   a 2.359105290696847 8.1638e-09 au q 1.843826505899381 1.4544e-07 au i 7.491801891021978 6.0842e-06 deg node 39.50410585101245 2.884e-05 deg peri 318.0534679978488 3.0202e-05 deg M 332.4675611062747 8.7592e-06 deg tp 2459301.718896202098 (2021-Mar-28.21889620) 3.2359e-05 TDB period 1323.486189269627 3.62 6.87e-06 1.881e-08 d yr n .2720088829930806 1.412e-09 deg/d Q 2.874384075494313 9.947e-09 au   Orbit Determination Parameters    # obs. used (total)      690      data-arc span      9563 days (26.18 yr)      first obs. used      1994-04-10      last obs. used      2020-06-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53004      source      ORB      producer      Otto Matic      solution date      2020-Jun-24 01:19:16   Additional Information  Earth MOID = .847029 au   Jupiter MOID = 2.59134 au   T_jup = 3.509  [ 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 15.88   n/a E2021B55   103034 (1999 XD117)          Discovered 1999-Dec-05 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-03 19:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin