+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   150888 (2001 SD254) Classification: Main-belt Asteroid          SPK-ID: 2150888 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1886348947267132 3.1106e-08   a 2.423491049485703 1.0737e-08 au q 1.966336070494836 7.4831e-08 au i 1.546618596157441 6.1482e-06 deg node 37.63772915759653 0.00012086 deg peri 282.1359307323536 0.00012199 deg M 79.1190874708592 1.6945e-05 deg tp 2458897.641807631247 (2020-Feb-18.14180763) 6.4209e-05 TDB period 1378.035980166079 3.77 9.1581e-06 2.507e-08 d yr n .2612413646533476 1.7361e-09 deg/d Q 2.88064602847657 1.2763e-08 au   Orbit Determination Parameters    # obs. used (total)      443      data-arc span      8070 days (22.09 yr)      first obs. used      1999-01-07      last obs. used      2021-02-10      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5886      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:20:29   Additional Information  Earth MOID = .952134 au   Jupiter MOID = 2.42598 au   T_jup = 3.487  [ 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 16.7   n/a MPO432960   150888 (2001 SD254)          Discovered 2001-Sep-19 by LINEAR at Socorro Reference: 20070303/Numbers.arc Last Updated: 2007-03-07 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 12:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin