+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103146 (1999 XS210) Classification: Main-belt Asteroid          SPK-ID: 2103146 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1454523350727677 5.2796e-08   a 2.752157193858562 1.8363e-08 au q 2.351849503524519 1.3984e-07 au i 10.06338778731613 5.6638e-06 deg node 13.2728670618807 2.4775e-05 deg peri 144.4495029524773 2.9774e-05 deg M 165.066510781817 1.7758e-05 deg tp 2458435.846376640122 (2018-Nov-13.34637664) 7.978e-05 TDB period 1667.662950563073 4.57 1.6691e-05 4.57e-08 d yr n .215870958744061 2.1605e-09 deg/d Q 3.152464884192606 2.1034e-08 au   Orbit Determination Parameters    # obs. used (total)      562      data-arc span      8002 days (21.91 yr)      first obs. used      1998-10-14      last obs. used      2020-09-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53316      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:50:27   Additional Information  Earth MOID = 1.36756 au   Jupiter MOID = 1.83944 au   T_jup = 3.308  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.3   n/a MPO436484   diameter diameter 2.502 km 0.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.257   0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103146 (1999 XS210)          Discovered 1999-Dec-13 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 XS210 = 2003 UH152  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 19:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin