+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11863 (1989 EX) Classification: Main-belt Asteroid          SPK-ID: 2011863 [ 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 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1276394007053071 2.6208e-08   a 2.561648725388932 1.0023e-08 au q 2.234681417262775 6.6044e-08 au i 11.78850014960022 8.3693e-07 deg node 135.2059375331189 4.6686e-06 deg peri 62.83037458335161 1.0643e-05 deg M 263.760617647386 1.2535e-05 deg tp 2459600.839199405001 (2022-Jan-21.33919941) 5.3204e-05 TDB period 1497.537788197223 4.10 8.7895e-06 2.406e-08 d yr n .2403946016169501 1.411e-09 deg/d Q 2.888616033515089 1.1303e-08 au   Orbit Determination Parameters    # obs. used (total)      1932      data-arc span      11704 days (32.04 yr)      first obs. used      1989-03-08      last obs. used      2021-03-24      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47971      source      ORB      producer      Otto Matic      solution date      2021-May-04 01:03:22   Additional Information  Earth MOID = 1.26206 au   Jupiter MOID = 2.13896 au   T_jup = 3.394  [ 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 13.44   n/a MPCxxxxx   11863 (1989 EX)          Discovered 1989-Mar-08 by Hioki, T., Kawasato, N. at Okutama Reference: 19991026/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-May-14 02:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin