+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   190364 (1999 LJ4) Classification: Main-belt Asteroid          SPK-ID: 2190364 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3230924436016438 4.2713e-08   a 2.622907060962349 1.1491e-08 au q 1.775465609296018 1.1514e-07 au i 28.80916454027538 4.6285e-06 deg node 126.2998626235332 9.3613e-06 deg peri 91.82180500343141 1.3484e-05 deg M 35.65741129566584 6.5984e-06 deg tp 2459046.819031085175 (2020-Jul-16.31903109) 2.8207e-05 TDB period 1551.575024630627 4.25 1.0196e-05 2.792e-08 d yr n .2320222962377876 1.5247e-09 deg/d Q 3.470348512628681 1.5203e-08 au   Orbit Determination Parameters    # obs. used (total)      889      data-arc span      7821 days (21.41 yr)      first obs. used      1999-04-09      last obs. used      2020-09-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42016      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 07:02:40   Additional Information  Earth MOID = .999272 au   Jupiter MOID = 2.32924 au   T_jup = 3.161  [ 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 15.23   n/a E2021B55   190364 (1999 LJ4)          Discovered 1999-Jun-10 by LINEAR at Socorro Reference: 20080917/Numbers.arc Last Updated: 2008-09-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-12 12:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin