+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103129 (1999 XA196) Classification: Main-belt Asteroid          SPK-ID: 2103129 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .111003754438854 3.1425e-08   a 2.293541723329516 6.6627e-09 au q 2.03894998107778 7.1945e-08 au i 5.28192681776952 3.6099e-06 deg node 37.48837144901189 4.2531e-05 deg peri 59.01871272467841 4.6966e-05 deg M 12.97253162134119 1.9221e-05 deg tp 2459154.782693888988 (2020-Nov-01.28269389) 6.7708e-05 TDB period 1268.698406785043 3.47 5.5283e-06 1.514e-08 d yr n .2837553811644341 1.2365e-09 deg/d Q 2.548133465581252 7.4023e-09 au   Orbit Determination Parameters    # obs. used (total)      959      data-arc span      7711 days (21.11 yr)      first obs. used      1999-12-12      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54583      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:33:24   Additional Information  Earth MOID = 1.06125 au   Jupiter MOID = 2.59296 au   T_jup = 3.583  [ 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 15.8   n/a MPO395907   diameter diameter 1.780 km 0.174 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.293   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103129 (1999 XA196)          Discovered 1999-Dec-12 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 XA196 = 2002 RL60  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-01 11:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin