+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1278076661751091 4.2032e-08   a 2.561121517575003 1.1531e-08 au q 2.233790553622888 1.0349e-07 au i 11.78837439242741 4.1479e-06 deg node 135.208249026236 2.1808e-05 deg peri 62.89507966607815 2.8191e-05 deg M 215.6121965723733 1.9226e-05 deg tp 2459600.942898890316 (2022-Jan-21.44289889) 8.1557e-05 TDB period 1497.075504087588 4.10 1.011e-05 2.768e-08 d yr n .240468833413587 1.624e-09 deg/d Q 2.888452481527118 1.3004e-08 au   Orbit Determination Parameters    # obs. used (total)      1669      data-arc span      11571 days (31.68 yr)      first obs. used      1989-03-08      last obs. used      2020-11-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50625      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:47:17   Additional Information  Earth MOID = 1.26181 au   Jupiter MOID = 2.14024 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 13.4   n/a MPO395116   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-Jan-26 01:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin