+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101486 (1998 WJ38) Classification: Main-belt Asteroid          SPK-ID: 2101486 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07777625220530314 4.5928e-08   a 3.075769909750828 2.6009e-08 au q 2.836548053524565 1.496e-07 au i 7.093092220410458 5.0046e-06 deg node 56.5851501516299 4.2086e-05 deg peri 353.6802308383221 5.6093e-05 deg M 355.3167813540259 3.5772e-05 deg tp 2459026.131329058458 (2020-Jun-25.63132906) 0.00019582 TDB period 1970.285642968476 5.39 2.4991e-05 6.842e-08 d yr n .1827146237829841 2.3176e-09 deg/d Q 3.314991765977091 2.8032e-08 au   Orbit Determination Parameters    # obs. used (total)      455      data-arc span      8019 days (21.95 yr)      first obs. used      1998-11-15      last obs. used      2020-10-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55892      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:00:20   Additional Information  Earth MOID = 1.84724 au   Jupiter MOID = 2.01662 au   T_jup = 3.213  [ 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 15.1   n/a MPO493570   diameter diameter 6.507 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.035   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101486 (1998 WJ38)          Discovered 1998-Nov-21 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 WJ38 = 2003 SZ232  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-28 20:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin