+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103042 (1999 XO122) Classification: Main-belt Asteroid          SPK-ID: 2103042 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1167948786421303 5.2685e-08   a 2.42289736826874 1.108e-08 au q 2.139915364179456 1.2772e-07 au i 5.90592682179536 5.3831e-06 deg node 342.8176002686191 3.385e-05 deg peri 50.30761432467782 3.869e-05 deg M 226.0233586131235 2.0035e-05 deg tp 2459713.157765005231 (2022-May-13.65776501) 7.86e-05 TDB period 1377.529646148907 3.77 9.4495e-06 2.587e-08 d yr n .2613373882779471 1.7927e-09 deg/d Q 2.705879372358024 1.2374e-08 au   Orbit Determination Parameters    # obs. used (total)      1090      data-arc span      7528 days (20.61 yr)      first obs. used      1999-10-12      last obs. used      2020-05-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52977      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:51:03   Additional Information  Earth MOID = 1.14961 au   Jupiter MOID = 2.71643 au   T_jup = 3.496  [ 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 15.34   n/a E2021B55   diameter diameter 2.216 km 0.289 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.299   0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103042 (1999 XO122)          Discovered 1999-Dec-07 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1999 XO122 = 2001 FH10  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-04 23:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin