+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   469859 (2005 UD18) Classification: Main-belt Asteroid          SPK-ID: 2469859 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1632988688676061 5.35e-08   a 2.396616194290967 1.4208e-08 au q 2.005251480653465 1.2427e-07 au i 4.134228657614098 6.3315e-06 deg node 221.5452953131242 5.5479e-05 deg peri 147.330234352341 5.8026e-05 deg M 44.60337501252687 1.6284e-05 deg tp 2459032.595868643308 (2020-Jul-02.09586864) 6.0792e-05 TDB period 1355.177433802556 3.71 1.2051e-05 3.299e-08 d yr n .2656478709137438 2.3623e-09 deg/d Q 2.787980907928469 1.6528e-08 au   Orbit Determination Parameters    # obs. used (total)      198      data-arc span      5591 days (15.31 yr)      first obs. used      2005-09-26      last obs. used      2021-01-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5668      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 16:20:34   Additional Information  Earth MOID = 1.0047 au   Jupiter MOID = 2.68627 au   T_jup = 3.507  [ 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 17.79   n/a MPCxxxxx   469859 (2005 UD18)          Discovered 2005-Sep-26 by Spacewatch at Kitt Peak Reference: Last Updated: 2016-08-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jun-22 07:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin