+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   14639 (1998 WK3) Classification: Main-belt Asteroid          SPK-ID: 2014639 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2150277093396333 3.6621e-08   a 2.638541078907386 7.6487e-09 au q 2.071181634711406 9.5865e-08 au i .7883850975889987 3.2886e-06 deg node 269.7365281994715 0.00027745 deg peri 100.9074697514679 0.00027755 deg M 107.3955125023288 7.0194e-06 deg tp 2458733.488203308643 (2019-Sep-06.98820331) 3.0223e-05 TDB period 1565.468080477225 4.29 6.8071e-06 1.864e-08 d yr n .2299631685177866 9.9994e-10 deg/d Q 3.205900523103367 9.2934e-09 au   Orbit Determination Parameters    # obs. used (total)      1716      data-arc span      16243 days (44.47 yr)      first obs. used      1976-09-24      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47291      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:34:22   Additional Information  Earth MOID = 1.06968 au   Jupiter MOID = 2.26303 au   T_jup = 3.363  [ 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 14.72   n/a E2021B10   diameter diameter 6.720 km 0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.062   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   14639 (1998 WK3)          Discovered 1998-Nov-19 by Kobayashi, T. at Oizumi Reference: 20000418/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 WK3 = 1976 SY10 = 1985 YD2 = 1989 UG5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 13:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin