+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .163237544655911 8.118e-08   a 2.39635770016062 2.0509e-08 au q 2.005182153069114 2.0148e-07 au i 4.134431929826286 7.136e-06 deg node 221.5451476776553 7.9534e-05 deg peri 147.2910012289489 8.1403e-05 deg M 351.5005016529409 1.9028e-05 deg tp 2459032.490180260419 (2020-Jul-01.99018026) 7.1854e-05 TDB period 1354.95818970723 3.71 1.7394e-05 4.762e-08 d yr n .2656908550645288 3.4108e-09 deg/d Q 2.787533247252125 2.3857e-08 au   Orbit Determination Parameters    # obs. used (total)      135      data-arc span      5029 days (13.77 yr)      first obs. used      2005-09-26      last obs. used      2019-07-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .63974      source      ORB      producer      Otto Matic      solution date      2019-Sep-24 08:02:45   Additional Information  Earth MOID = 1.00613 au   Jupiter MOID = 2.68564 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 17.6   n/a MPO437770   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 ] 2020-Aug-09 03:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin