+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   11866 (1989 SL12) Classification: Main-belt Asteroid          SPK-ID: 2011866 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO233587 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1606426 n/a   a 2.8971395 n/a AU q 2.4317355 n/a AU i 0.83277 n/a deg node 309.88845 n/a deg peri 134.71496 n/a deg M 217.08341 n/a deg tp 2457115.5438673 (2015-Apr-03.04386730) n/a JED period 1801.1610284 4.93 n/a n/a d yr n 0.19987108 n/a deg/d Q 3.3625435 n/a AU   Orbit Determination Parameters    # obs. used (total)      845      first obs. used      1981-??-??      last obs. used      2012-06-12      # oppositions      17      planetary ephem.      DE403      condition code      0      fit RMS      0.52      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.269  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.2 mag n/a PDS3 (MPC 36237)   11866 (1989 SL12)          Discovered 1989-Sep-30 by Debehogne, H. at La Silla (809) Reference: 19991026/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 SL12 = 1981 CC = 1991 BD3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 15:26 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin