+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   117241 (2004 SS20) Classification: Main-belt Asteroid          SPK-ID: 2117241 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2015858012841357 4.7245e-08   a 2.36975094550043 1.3251e-08 au q 1.892042802307888 1.0829e-07 au i 1.849490801668285 5.5691e-06 deg node 36.27077921415766 0.00012836 deg peri 319.0550712190574 0.00012898 deg M 125.6222250042811 1.4875e-05 deg tp 2458535.539065770146 (2019-Feb-21.03906577) 5.2751e-05 TDB period 1332.454797047601 3.65 1.1176e-05 3.06e-08 d yr n .2701780208962234 2.2662e-09 deg/d Q 2.847459088692972 1.5922e-08 au   Orbit Determination Parameters    # obs. used (total)      456      data-arc span      9632 days (26.37 yr)      first obs. used      1993-09-19      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52359      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 05:44:35   Additional Information  Earth MOID = .88795 au   Jupiter MOID = 2.59364 au   T_jup = 3.517  [ 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 16.9   n/a MPO359559   117241 (2004 SS20)          Discovered 2004-Sep-17 by Yeung, W. K. Y. at Desert Eagle Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-19 00:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin