+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   49773 (1999 WJ8) Classification: Main-belt Asteroid          SPK-ID: 2049773 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0678595076040711 3.3519e-08   a 2.365287073291565 8.0077e-09 au q 2.204779857155725 7.7623e-08 au i 6.349026509961522 3.4722e-06 deg node 130.700683767528 2.9997e-05 deg peri 76.84539849738673 3.8533e-05 deg M 105.7553882147217 2.4902e-05 deg tp 2458610.176933225781 (2019-May-06.67693323) 9.155e-05 TDB period 1328.691676242727 3.64 6.7475e-06 1.847e-08 d yr n .2709432191356897 1.3759e-09 deg/d Q 2.525794289427405 8.5511e-09 au   Orbit Determination Parameters    # obs. used (total)      1473      data-arc span      10157 days (27.81 yr)      first obs. used      1993-01-23      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53699      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:28:38   Additional Information  Earth MOID = 1.21076 au   Jupiter MOID = 2.44848 au   T_jup = 3.537  [ 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 15.2   n/a MPO474378   49773 (1999 WJ8)          Discovered 1999-Nov-28 by Kobayashi, T. at Oizumi Reference: 20021120/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-25 06:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin