+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   277259 (2005 SS9) Classification: Main-belt Asteroid          SPK-ID: 2277259 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2426137798054237 5.8332e-08   a 2.309694691614202 6.4866e-09 au q 1.749330932285158 1.3554e-07 au i 2.772924210251813 7.0311e-06 deg node 211.6340065579119 7.3826e-05 deg peri 141.9741909877892 7.5708e-05 deg M 78.02611929208564 1.217e-05 deg tp 2458722.613276717678 (2019-Aug-27.11327672) 4.3351e-05 TDB period 1282.124771669673 3.51 5.4011e-06 1.479e-08 d yr n .2807839049324215 1.1828e-09 deg/d Q 2.870058450943246 8.0603e-09 au   Orbit Determination Parameters    # obs. used (total)      388      data-arc span      8776 days (24.03 yr)      first obs. used      1995-12-18      last obs. used      2019-12-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52459      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 21:19:41   Additional Information  Earth MOID = .745432 au   Jupiter MOID = 2.57902 au   T_jup = 3.544  [ 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 17.3   n/a MPO503247   277259 (2005 SS9)          Discovered 2005-Sep-24 by Spacewatch at Kitt Peak Reference: 20110517/Numbers.arc Last Updated: 2011-05-20 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-28 00:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin