+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   243998 (2001 SR11) Classification: Main-belt Asteroid          SPK-ID: 2243998 [ 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 9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1056551290458091 5.0593e-08   a 2.980489007489244 3.0104e-08 au q 2.665585056783352 1.4801e-07 au i 9.794864317687464 7.3436e-06 deg node 356.6620531990887 3.1057e-05 deg peri 320.0299598423567 5.2122e-05 deg M 254.2606747733295 4.5155e-05 deg tp 2459552.531356672857 (2021-Dec-04.03135667) 0.00024096 TDB period 1879.445400055409 5.15 2.8475e-05 7.796e-08 d yr n .1915458677274618 2.902e-09 deg/d Q 3.295392958195136 3.3285e-08 au   Orbit Determination Parameters    # obs. used (total)      238      data-arc span      21762 days (59.58 yr)      first obs. used      1960-09-26      last obs. used      2020-04-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60253      source      ORB      producer      Otto Matic      solution date      2020-May-21 12:52:21   Additional Information  Earth MOID = 1.66174 au   Jupiter MOID = 2.06922 au   T_jup = 3.229  [ 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 15.8   n/a MPO433598   243998 (2001 SR11)          Discovered 2001-Sep-16 by LINEAR at Socorro Reference: 20100726/Numbers.arc Last Updated: 2010-07-28 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-05 21:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin