+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   117637 (2005 EJ131) Classification: Main-belt Asteroid          SPK-ID: 2117637 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08391289669660723 4.2475e-08   a 2.739236434514078 1.8931e-08 au q 2.509379170557116 1.1305e-07 au i 9.762658036664163 4.676e-06 deg node 90.65502375456846 2.6411e-05 deg peri 55.10778293924162 3.8351e-05 deg M 181.450295311011 2.9184e-05 deg tp 2460021.795307914766 (2023-Mar-18.29530791) 0.00013599 TDB period 1655.932791176155 4.53 1.7167e-05 4.7e-08 d yr n .2174001275403839 2.2537e-09 deg/d Q 2.969093698471041 2.052e-08 au   Orbit Determination Parameters    # obs. used (total)      460      data-arc span      9435 days (25.83 yr)      first obs. used      1994-11-11      last obs. used      2020-09-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56942      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 18:17:17   Additional Information  Earth MOID = 1.53699 au   Jupiter MOID = 2.09905 au   T_jup = 3.325  [ 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 15.44   n/a E2021B55   117637 (2005 EJ131)          Discovered 2005-Mar-09 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-07 20:47 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin