+ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1632375585463182 5.7016e-08   a 2.396357687188079 1.4892e-08 au q 2.005182108927796 1.3421e-07 au i 4.134432790227653 6.8112e-06 deg node 221.5451368411758 6.2797e-05 deg peri 147.2910036449427 6.5121e-05 deg M 351.5005170316391 1.6355e-05 deg tp 2459032.490122118729 (2020-Jul-01.99012212) 6.1664e-05 TDB period 1354.958178704751 3.71 1.263e-05 3.458e-08 d yr n .2656908572219814 2.4766e-09 deg/d Q 2.787533265448363 1.7323e-08 au   Orbit Determination Parameters    # obs. used (total)      167      data-arc span      5528 days (15.13 yr)      first obs. used      2005-09-26      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58983      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 01:34:58   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 ] 2021-Jan-26 09:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin