+ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1278076736831839 4.4129e-08   a 2.561121519413524 1.1984e-08 au q 2.23379053599734 1.082e-07 au i 11.78837419834932 4.2136e-06 deg node 135.2082481651387 2.1921e-05 deg peri 62.89508041783107 2.83e-05 deg M 215.6121956621462 1.9282e-05 deg tp 2459600.942903322084 (2022-Jan-21.44290332) 8.1875e-05 TDB period 1497.075505699619 4.10 1.0508e-05 2.877e-08 d yr n .2404688331546534 1.6878e-09 deg/d Q 2.888452502829708 1.3516e-08 au   Orbit Determination Parameters    # obs. used (total)      1566      data-arc span      11282 days (30.89 yr)      first obs. used      1989-03-08      last obs. used      2020-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51781      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 20:10:41   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 ] 2020-Oct-26 05:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin