+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103135 (1999 XL202) Classification: Main-belt Asteroid          SPK-ID: 2103135 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05716804764257425 3.8404e-08   a 2.291694791994523 7.8923e-09 au q 2.160683074943541 8.9497e-08 au i 6.926640991893686 4.2531e-06 deg node 34.57702142493461 3.5755e-05 deg peri 75.89969997736615 5.608e-05 deg M 6.894395850064448 4.2312e-05 deg tp 2459176.232373166639 (2020-Nov-22.73237317) 0.00014893 TDB period 1267.166239073477 3.47 6.546e-06 1.792e-08 d yr n .2840984780838414 1.4676e-09 deg/d Q 2.422706509045505 8.3435e-09 au   Orbit Determination Parameters    # obs. used (total)      874      data-arc span      7711 days (21.11 yr)      first obs. used      1999-12-12      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59339      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:33:25   Additional Information  Earth MOID = 1.18948 au   Jupiter MOID = 2.62713 au   T_jup = 3.586  [ 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 15.8   n/a MPO449622   103135 (1999 XL202)          Discovered 1999-Dec-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-04 20:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin