+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08262709360798373 3.6263e-08   a 2.383548912453108 1.0239e-08 au q 2.186603193344637 8.7286e-08 au i 5.793818866599162 4.9167e-06 deg node 220.5121253462102 3.3818e-05 deg peri 218.8192765903684 4.5721e-05 deg M 339.5836401689192 2.8904e-05 deg tp 2459276.727265422772 (2021-Mar-03.22726542) 0.0001078 TDB period 1344.10912519391 3.68 8.661e-06 2.371e-08 d yr n .2678353961387355 1.7258e-09 deg/d Q 2.580494631561578 1.1085e-08 au   Orbit Determination Parameters    # obs. used (total)      560      data-arc span      8137 days (22.28 yr)      first obs. used      1998-10-23      last obs. used      2021-02-01      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52493      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 16:56:41   Additional Information  Earth MOID = 1.20467 au   Jupiter MOID = 2.60766 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 16.27   n/a E2021B55   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 ] 2021-Apr-22 18:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin