+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109656 (2001 RY8) Classification: Main-belt Asteroid          SPK-ID: 2109656 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1154545109930039 6.3563e-08   a 2.943001699712412 2.0088e-08 au q 2.603218877620536 1.9375e-07 au i 1.739693331484358 5.4221e-06 deg node 12.87499066739207 0.00014005 deg peri .4423693202913326 0.00014169 deg M 234.7374967555035 2.5688e-05 deg tp 2459642.156771611363 (2022-Mar-03.65677161) 0.00013577 TDB period 1844.098846797074 5.05 1.8881e-05 5.169e-08 d yr n .1952173011903709 1.9987e-09 deg/d Q 3.282784521804287 2.2407e-08 au   Orbit Determination Parameters    # obs. used (total)      501      data-arc span      8713 days (23.85 yr)      first obs. used      1996-09-05      last obs. used      2020-07-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .6171      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:10:44   Additional Information  Earth MOID = 1.60365 au   Jupiter MOID = 2.18238 au   T_jup = 3.261  [ 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 15.3   n/a MPO264102   109656 (2001 RY8)          Discovered 2001-Sep-07 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Dec-02 20:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin