+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   58149 (1987 SX11) Classification: Mars-crossing Asteroid          SPK-ID: 2058149 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3792060476713116 1.3629e-07   a 2.667490428096384 3.1198e-08 AU q 1.655961925656899 3.5076e-07 AU i 26.11175726022259 1.9279e-05 deg node 172.9417221500212 2.7483e-05 deg peri 237.1011405206951 3.8032e-05 deg M 290.2969044015652 2.0858e-05 deg tp 2456708.607518875507 (2014-Feb-20.10751888) 9.4631e-05 JED period 1591.302449954222 4.36 2.7917e-05 7.643e-08 d yr n .2262297780100549 3.9688e-09 deg/d Q 3.679018930535868 4.3028e-08 AU   Orbit Determination Parameters    # obs. used (total)      224      data-arc span      9339 days (25.57 yr)      first obs. used      1987-09-16      last obs. used      2013-04-11      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .50108      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 16:36:46   Additional Information  Earth MOID = .766379 AU   T_jup = 3.140  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.82 mag .49931 1 autocmod 2.5c 58149 (1987 SX11)          Discovered 1987-Sep-26 by Debehogne, H. at La Silla (809) Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1987 SX11 = 2000 PS25  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-20 11:59 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin