+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1805718699254301 6.4503e-08   a 2.536259589031417 9.2829e-09 au q 2.078282452423711 1.6688e-07 au i 2.175826460958031 5.8708e-06 deg node 214.6896686514392 8.3748e-05 deg peri 185.1054706343577 8.4758e-05 deg M 181.0432823286931 1.2053e-05 deg tp 2459933.889156943987 (2022-Dec-20.38915694) 5.1844e-05 TDB period 1475.329341839884 4.04 8.0997e-06 2.218e-08 d yr n .2440133126824711 1.3397e-09 deg/d Q 2.994236725639122 1.0959e-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 = 1.08521 au   Jupiter MOID = 2.41808 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. 2020-October); 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 ] 2021-Apr-10 13:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin