+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103090 (1999 XO163) Classification: Main-belt Asteroid          SPK-ID: 2103090 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1887600911357969 3.7017e-08   a 2.652427597373719 1.0464e-08 au q 2.151755122362353 1.0276e-07 au i 2.816167875183054 3.4367e-06 deg node 100.4811933825017 8.0771e-05 deg peri 337.680332319036 8.1417e-05 deg M 326.5953674105875 1.0516e-05 deg tp 2459346.909053277861 (2021-May-12.40905328) 4.643e-05 TDB period 1577.842804855016 4.32 9.3367e-06 2.556e-08 d yr n .2281596106356613 1.3501e-09 deg/d Q 3.153100072385085 1.2439e-08 au   Orbit Determination Parameters    # obs. used (total)      921      data-arc span      7699 days (21.08 yr)      first obs. used      1999-12-08      last obs. used      2021-01-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53968      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:33:17   Additional Information  Earth MOID = 1.16718 au   Jupiter MOID = 2.10359 au   T_jup = 3.362  [ 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 15.5   n/a MPO432557   diameter diameter 5.498 km 0.568 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.037   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103090 (1999 XO163)          Discovered 1999-Dec-08 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-08 20:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin