+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   437399 (2013 WR64) Classification: Main-belt Asteroid          SPK-ID: 2437399 [ 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 .162915199011183 8.9647e-08   a 2.624755172076552 3.5085e-08 au q 2.197142660862069 2.4064e-07 au i 12.63847350589118 9.3708e-06 deg node 252.3159932972154 6.0295e-05 deg peri 182.897980728756 8.2631e-05 deg M 178.2853871477058 5.413e-05 deg tp 2458231.290082863696 (2018-Apr-22.79008286) 0.00022979 TDB period 1553.215182687129 4.25 3.1143e-05 8.526e-08 d yr n .2317772862464456 4.6473e-09 deg/d Q 3.052367683291036 4.0801e-08 au   Orbit Determination Parameters    # obs. used (total)      140      data-arc span      6695 days (18.33 yr)      first obs. used      2000-11-30      last obs. used      2019-03-31      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .62224      source      ORB      producer      Otto Matic      solution date      2019-Jul-14 15:44:11   Additional Information  Earth MOID = 1.21228 au   Jupiter MOID = 2.23193 au   T_jup = 3.350  [ 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 MPCxxxxx   437399 (2013 WR64)          Discovered 2013-Oct-24 by CSS at Catalina Reference: Last Updated: 2015-06-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-06 08:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin