+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   259684 (2003 XU16) Classification: Main-belt Asteroid          SPK-ID: 2259684 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1489821341612672 4.1157e-08   a 2.312745508361437 1.4498e-08 au q 1.968187746753866 9.0504e-08 au i 1.440742469999488 4.4464e-06 deg node 244.4185575483078 0.00017285 deg peri 291.4718861384519 0.00017362 deg M 158.4786108948699 1.7307e-05 deg tp 2458434.966480107735 (2018-Nov-12.46648011) 5.9294e-05 TDB period 1284.66589914946 3.52 1.208e-05 3.307e-08 d yr n .2802285016192503 2.635e-09 deg/d Q 2.657303269969009 1.6658e-08 au   Orbit Determination Parameters    # obs. used (total)      273      data-arc span      6172 days (16.90 yr)      first obs. used      2003-11-24      last obs. used      2020-10-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55675      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 23:08:18   Additional Information  Earth MOID = .973074 au   Jupiter MOID = 2.30968 au   T_jup = 3.568  [ 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 17.5   n/a MPO433692   259684 (2003 XU16)          Discovered 2003-Dec-14 by Spacewatch at Kitt Peak Reference: 20110119/Numbers.arc Last Updated: 2011-01-25 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-17 23:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin