+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   11891 (1991 FJ2) Classification: Main-belt Asteroid          SPK-ID: 2011891 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250330 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0940756 n/a   a 2.2419877 n/a AU q 2.0310714 n/a AU i 2.97992 n/a deg node 186.73512 n/a deg peri 357.38503 n/a deg M 197.12347 n/a deg tp 2456955.2588977 (2014-Oct-24.75889770) n/a JED period 1226.1631750 3.36 n/a n/a d yr n 0.29359877 n/a deg/d Q 2.4529040 n/a AU   Orbit Determination Parameters    # obs. used (total)      771      first obs. used      1949-??-??      last obs. used      2012-12-07      # oppositions      14      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.626  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.9 mag n/a PDS3 (MPC 36244)   11891 (1991 FJ2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla (809) Reference: 19991026/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 FJ2 = 1999 RR257  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 08:44 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin