+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102938 (1999 XU47) Classification: Main-belt Asteroid          SPK-ID: 2102938 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2172510055355825 4.2275e-08   a 2.346675791519841 9.9016e-09 au q 1.836858116146147 9.9898e-08 au i 3.133553569291199 3.9496e-06 deg node 73.1946377126458 8.4652e-05 deg peri 275.7150200646621 8.5104e-05 deg M 358.8578538023967 1.1588e-05 deg tp 2459204.665788954111 (2020-Dec-21.16578895) 4.2282e-05 TDB period 1313.040332863553 3.59 8.3104e-06 2.275e-08 d yr n .2741728422118546 1.7353e-09 deg/d Q 2.856493466893535 1.2053e-08 au   Orbit Determination Parameters    # obs. used (total)      690      data-arc span      8734 days (23.91 yr)      first obs. used      1997-02-03      last obs. used      2021-01-02      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53771      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:44:20   Additional Information  Earth MOID = .832051 au   Jupiter MOID = 2.57322 au   T_jup = 3.526  [ 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 16.07   n/a E2021B55   102938 (1999 XU47)          Discovered 1999-Dec-07 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-Apr-20 08:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin