+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   269487 (2009 UW17) Classification: Main-belt Asteroid          SPK-ID: 2269487 [ 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 .1057903234048765 4.2256e-08   a 2.52598760471647 2.1806e-08 au q 2.258762559096805 1.0832e-07 au i 6.851643905680988 4.4219e-06 deg node 136.0303566561393 6.1403e-05 deg peri 326.9546154929293 7.0288e-05 deg M 185.4431231635369 3.6075e-05 deg tp 2459711.516553220587 (2022-May-12.01655322) 0.00014835 TDB period 1466.37568108656 4.01 1.8988e-05 5.199e-08 d yr n .2455032531180864 3.179e-09 deg/d Q 2.793212650336134 2.4113e-08 au   Orbit Determination Parameters    # obs. used (total)      293      data-arc span      6907 days (18.91 yr)      first obs. used      2000-07-31      last obs. used      2019-06-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .64517      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 13:12:10   Additional Information  Earth MOID = 1.27899 au   Jupiter MOID = 2.31663 au   T_jup = 3.436  [ 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 16.5   n/a MPO437237   269487 (2009 UW17)          Discovered 2009-Oct-20 by Mayhill at Mayhill Reference: 20110319/Numbers.arc Last Updated: 2011-03-23 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-27 05:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin