+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103043 (1999 XP122) Classification: Main-belt Asteroid          SPK-ID: 2103043 [ 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 .1272057891882152 5.8077e-08   a 2.404913748462353 1.421e-08 au q 2.09899479715961 1.4304e-07 au i 6.748276137741914 6.0565e-06 deg node 8.243610195268614 3.1286e-05 deg peri 343.4832797079816 3.7347e-05 deg M 282.1504294705226 2.5368e-05 deg tp 2459495.078743143735 (2021-Oct-07.57874314) 9.7677e-05 TDB period 1362.221356013643 3.73 1.2074e-05 3.306e-08 d yr n .2642742300366597 2.3423e-09 deg/d Q 2.710832699765095 1.6018e-08 au   Orbit Determination Parameters    # obs. used (total)      661      data-arc span      7548 days (20.67 yr)      first obs. used      1999-10-12      last obs. used      2020-06-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54337      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:51:02   Additional Information  Earth MOID = 1.093 au   Jupiter MOID = 2.71173 au   T_jup = 3.503  [ 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 15.75   n/a E2021B55   diameter diameter 1.783 km 0.307 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.292   0.087 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103043 (1999 XP122)          Discovered 1999-Dec-07 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-04 22:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin