+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   118317 (1998 WK41) Classification: Main-belt Asteroid          SPK-ID: 2118317 [ 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 .08250166119629072 4.1544e-08   a 2.38333792065318 1.4674e-08 au q 2.186708583007179 9.5626e-08 au i 5.794033919113305 5.0817e-06 deg node 220.5116900182511 4.7096e-05 deg peri 218.820373563204 5.7703e-05 deg M 286.0013561954768 3.4581e-05 deg tp 2459276.747350224682 (2021-Mar-03.24735022) 0.00012973 TDB period 1343.930658291425 3.68 1.2412e-05 3.398e-08 d yr n .2678709632665703 2.4739e-09 deg/d Q 2.57996725829918 1.5885e-08 au   Orbit Determination Parameters    # obs. used (total)      412      data-arc span      7092 days (19.42 yr)      first obs. used      1998-10-23      last obs. used      2018-03-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56292      source      ORB      producer      Otto Matic      solution date      2018-Apr-05 15:11:14   Additional Information  Earth MOID = 1.20524 au   Jupiter MOID = 2.60848 au   T_jup = 3.525  [ 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 16.3   n/a MPO245008   118317 (1998 WK41)          Discovered 1998-Nov-18 by LINEAR at Socorro Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-21 11:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin