+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   259690 (2003 XS38) Classification: Main-belt Asteroid          SPK-ID: 2259690 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .203352272572866 3.2494e-08   a 2.278514101031897 8.0509e-09 au q 1.81517308049774 7.5299e-08 au i 4.193913895248688 4.6153e-06 deg node 45.09820570913188 5.2992e-05 deg peri 21.67177355537206 5.5174e-05 deg M 293.7751416387405 1.3366e-05 deg tp 2459231.597126375244 (2021-Jan-17.09712638) 4.645e-05 TDB period 1256.249806398309 3.44 6.6583e-06 1.823e-08 d yr n .2865672083422058 1.5188e-09 deg/d Q 2.741855121566055 9.6881e-09 au   Orbit Determination Parameters    # obs. used (total)      495      data-arc span      7208 days (19.73 yr)      first obs. used      2001-02-20      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49619      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 00:16:59   Additional Information  Earth MOID = .829658 au   Jupiter MOID = 2.56945 au   T_jup = 3.576  [ 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 16.9   n/a MPO437206   259690 (2003 XS38)          Discovered 2003-Dec-04 by LINEAR at Socorro Reference: 20110119/Numbers.arc Last Updated: 2011-01-25 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-24 21:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin