+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   134483 (1998 WK2) Classification: Main-belt Asteroid          SPK-ID: 2134483 [ 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 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1804332018506782 6.4477e-08   a 2.536635551966928 9.2983e-09 au q 2.078942277397273 1.6684e-07 au i 2.175578983072767 5.8702e-06 deg node 214.6917262971448 8.3757e-05 deg peri 185.1403444126969 8.477e-05 deg M 132.2010469230755 1.1917e-05 deg tp 2458458.601519827795 (2018-Dec-06.10151983) 4.7234e-05 TDB period 1475.657397596164 4.04 8.1138e-06 2.221e-08 d yr n .2439590656926449 1.3414e-09 deg/d Q 2.994328826536583 1.0976e-08 au   Orbit Determination Parameters    # obs. used (total)      1020      data-arc span      9265 days (25.37 yr)      first obs. used      1994-12-07      last obs. used      2020-04-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54031      source      ORB      producer      Otto Matic      solution date      2020-May-20 22:20:01   Additional Information  Earth MOID = 1.0869 au   Jupiter MOID = 2.41685 au   T_jup = 3.424  [ 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 15.9   n/a MPO459635   diameter diameter 1.735 km 0.291 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 9.50 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 [Result based on fragmentary lightcurve(s), may be completely wrong.] geometric albedo albedo 0.338   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   134483 (1998 WK2)          Discovered 1998-Nov-19 by Griffin, I. P. at Cocoa Reference: 20060907/Numbers.arc Last Updated: 2006-09-10 Alternate Designations  1998 WK2 = 1994 XU  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-30 17:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin