+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07802840980069126 4.4413e-08   a 3.076617949168319 2.4995e-08 au q 2.836554343030451 1.4342e-07 au i 7.092264890590817 4.9357e-06 deg node 56.5840594409156 4.1014e-05 deg peri 353.6992203380951 5.5031e-05 deg M 31.82987291744015 3.5124e-05 deg tp 2459026.222554767643 (2020-Jun-25.72255477) 0.00019217 TDB period 1971.100558471667 5.40 2.4021e-05 6.577e-08 d yr n .1826390837609692 2.2257e-09 deg/d Q 3.316681555306187 2.6946e-08 au   Orbit Determination Parameters    # obs. used (total)      506      data-arc span      8125 days (22.25 yr)      first obs. used      1998-11-15      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53833      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:37:00   Additional Information  Earth MOID = 1.84639 au   Jupiter MOID = 2.01553 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 ] 2021-Apr-20 05:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin