+ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1057903215149846 4.0091e-08   a 2.525987604085281 2.0659e-08 au q 2.258762563306234 1.0477e-07 au i 6.851646091528822 4.2522e-06 deg node 136.0304161916953 5.2205e-05 deg peri 326.9545584242627 5.9706e-05 deg M 185.4431213629116 3.1827e-05 deg tp 2459711.516560288512 (2022-May-12.01656029) 0.00013274 TDB period 1466.375680536938 4.01 1.799e-05 4.925e-08 d yr n .2455032532101051 3.0118e-09 deg/d Q 2.793212644864329 2.2845e-08 au   Orbit Determination Parameters    # obs. used (total)      305      data-arc span      7271 days (19.91 yr)      first obs. used      2000-07-31      last obs. used      2020-06-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .641      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 22:06:33   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 ] 2021-Jan-26 17:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin