+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   5516 Jawilliamson (1989 JK) Classification: Main-belt Asteroid          SPK-ID: 2005516 [ 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 40 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1683655957357952 3.3072e-08   a 2.584592296601314 9.0937e-09 au q 2.149435874849887 8.4486e-08 au i 12.97971594552256 3.0858e-06 deg node 160.221178806306 1.6308e-05 deg peri 38.11379632473999 1.8713e-05 deg M 194.2950984173439 1.0546e-05 deg tp 2459699.085150147969 (2022-Apr-29.58515015) 4.5969e-05 TDB period 1517.701960842852 4.16 8.0099e-06 2.193e-08 d yr n .2372007214117816 1.2519e-09 deg/d Q 3.019748718352742 1.0625e-08 au   Orbit Determination Parameters    # obs. used (total)      2182      data-arc span      13472 days (36.88 yr)      first obs. used      1983-12-29      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45254      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:22:42   Additional Information  Earth MOID = 1.16471 au   Jupiter MOID = 1.97153 au   T_jup = 3.367  [ 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 13.3   n/a MPO448969   diameter diameter 11.535 km 0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.072   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   5516 Jawilliamson (1989 JK)          Discovered 1989-May-02 by Helin, E. F. at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1989 JK = 1983 YA = 1990 QJ7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 16:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin