+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227463 (2005 WF117) Classification: Main-belt Asteroid          SPK-ID: 2227463 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1447226485875073 6.6435e-08   a 2.582769437426301 2.0818e-08 au q 2.208984203751101 1.7479e-07 au i 12.84278566726662 7.2463e-06 deg node 252.7904851744017 3.1518e-05 deg peri 187.4513621846814 5.0385e-05 deg M 235.915262939308 3.7208e-05 deg tp 2459723.067924314027 (2022-May-23.56792431) 0.00015944 TDB period 1516.09663854979 4.15 1.8331e-05 5.019e-08 d yr n .2374518819224842 2.871e-09 deg/d Q 2.956554671101502 2.3831e-08 au   Orbit Determination Parameters    # obs. used (total)      414      data-arc span      6799 days (18.61 yr)      first obs. used      2000-08-27      last obs. used      2019-04-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49357      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 06:05:36   Additional Information  Earth MOID = 1.22465 au   Jupiter MOID = 2.31151 au   T_jup = 3.374  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.8   n/a MPO437078   diameter diameter 2.078 km 0.469 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.283   0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   227463 (2005 WF117)          Discovered 2005-Nov-30 by LINEAR at Socorro Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ show close-approach data ] Alternate Designations  2005 WF117 = 2000 QX224  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 09:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin