+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1275570471693367 2.6092e-08   a 2.561852153331005 1.0025e-08 au q 2.235069857367695 6.579e-08 au i 11.78868418822034 8.3652e-07 deg node 135.2053045595067 4.6661e-06 deg peri 62.78422490692692 1.0626e-05 deg M 310.9109235762567 1.2601e-05 deg tp 2459600.726399711723 (2022-Jan-21.22639971) 5.2974e-05 TDB period 1497.716177456123 4.10 8.7915e-06 2.407e-08 d yr n .2403659688122361 1.4109e-09 deg/d Q 2.888634449294315 1.1304e-08 au   Orbit Determination Parameters    # obs. used (total)      1973      data-arc span      11761 days (32.20 yr)      first obs. used      1989-03-08      last obs. used      2021-05-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47543      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 16:39:01   Additional Information  Earth MOID = 1.26377 au   Jupiter MOID = 2.13802 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-Jul-28 15:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin