+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   437394 (2013 WE57) Classification: Main-belt Asteroid          SPK-ID: 2437394 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .178711506706817 1.7769e-07   a 2.147265225622649 4.6871e-08 au q 1.763524221852472 4.1853e-07 au i 3.90236193514912 5.0346e-06 deg node 122.4144194003361 8.108e-05 deg peri 250.1385368206977 8.3168e-05 deg M 58.10933913628485 2.0508e-05 deg tp 2458814.988687211633 (2019-Nov-27.48868721) 6.1339e-05 TDB period 1149.282948256945 3.15 3.763e-05 1.03e-07 d yr n .3132387899307064 1.0256e-08 deg/d Q 2.531006229392826 5.5247e-08 au   Orbit Determination Parameters    # obs. used (total)      141      data-arc span      4321 days (11.83 yr)      first obs. used      2007-12-30      last obs. used      2019-10-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5966      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 09:38:37   Additional Information  Earth MOID = .768205 au   Jupiter MOID = 2.93598 au   T_jup = 3.684  [ 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 18.0   n/a MPO440809   437394 (2013 WE57)          Discovered 2007-Dec-30 by Spacewatch at Kitt Peak Reference: Last Updated: 2015-06-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Dec-01 09:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin