+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100387 (1995 WJ4) Classification: Main-belt Asteroid          SPK-ID: 2100387 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1672412271664943 3.7208e-08   a 2.991861526684112 1.6285e-08 au q 2.491498933449239 1.1322e-07 au i 8.432945386379199 4.1258e-06 deg node 75.4509120863386 3.781e-05 deg peri 15.93244155426785 4.1501e-05 deg M 321.5923444383857 1.7892e-05 deg tp 2459598.162876642268 (2022-Jan-18.66287664) 9.4645e-05 TDB period 1890.212628957588 5.18 1.5433e-05 4.225e-08 d yr n .1904547639164448 1.555e-09 deg/d Q 3.492224119918983 1.9008e-08 au   Orbit Determination Parameters    # obs. used (total)      804      data-arc span      9138 days (25.02 yr)      first obs. used      1995-11-20      last obs. used      2020-11-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53386      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:31:57   Additional Information  Earth MOID = 1.5093 au   Jupiter MOID = 1.73849 au   T_jup = 3.218  [ 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 14.55   n/a E2021B55   diameter diameter 6.036 km 0.262 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.092   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100387 (1995 WJ4)          Discovered 1995-Nov-20 by Kobayashi, T. at Oizumi Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1995 WJ4 = 2000 UH24  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-29 10:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin