+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   183970 (2004 EC8) Classification: Main-belt Asteroid          SPK-ID: 2183970 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03147929793181305 3.7072e-08   a 2.467812859222878 1.3428e-08 au q 2.390127842987441 9.0924e-08 au i 7.880639549938563 4.8497e-06 deg node 346.1033111308418 3.1086e-05 deg peri 299.6710188270075 8.5699e-05 deg M 321.7126204228106 7.9992e-05 deg tp 2459151.098242743633 (2020-Oct-28.59824274) 0.00031474 TDB period 1416.011437356446 3.88 1.1558e-05 3.164e-08 d yr n .2542352346193507 2.0751e-09 deg/d Q 2.545497875458314 1.3851e-08 au   Orbit Determination Parameters    # obs. used (total)      370      data-arc span      10369 days (28.39 yr)      first obs. used      1992-01-31      last obs. used      2020-06-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .6119      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 08:29:30   Additional Information  Earth MOID = 1.38515 au   Jupiter MOID = 2.50923 au   T_jup = 3.472  [ 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 16.2   n/a MPO422717   183970 (2004 EC8)          Discovered 2004-Mar-13 by NEAT at Palomar Reference: 20080420/Numbers.arc Last Updated: 2008-04-23 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-24 13:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin