+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102889 (1999 XL5) Classification: Main-belt Asteroid          SPK-ID: 2102889 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2200631286338206 1.2743e-07   a 2.531602322447361 1.1873e-08 au q 1.974489994912948 3.3029e-07 au i 4.253388131915139 6.8156e-06 deg node 75.05180833657049 8.9071e-05 deg peri 358.1920579353498 9.7512e-05 deg M 72.50786586594062 3.6532e-05 deg tp 2458904.170917130235 (2020-Feb-24.67091713) 0.00014752 TDB period 1471.267545377115 4.03 1.035e-05 2.834e-08 d yr n .2446869715376783 1.7214e-09 deg/d Q 3.088714649981773 1.4486e-08 au   Orbit Determination Parameters    # obs. used (total)      992      data-arc span      10685 days (29.25 yr)      first obs. used      1991-12-13      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50243      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:44:06   Additional Information  Earth MOID = .988886 au   Jupiter MOID = 2.19922 au   T_jup = 3.412  [ 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 15.91   n/a E2021B55   102889 (1999 XL5)          Discovered 1999-Dec-04 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-Apr-17 19:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin