+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   11890 (1991 FF) Classification: Outer Main-belt Asteroid          SPK-ID: 2011890 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO253448 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0483644 n/a   a 3.2344496 n/a AU q 3.0780174 n/a AU i 17.80411 n/a deg node 337.63498 n/a deg peri 206.54921 n/a deg M 291.50631 n/a deg tp 2456804.7472297 (2014-May-27.24722970) n/a JED period 2124.7067093 5.82 n/a n/a d yr n 0.16943515 n/a deg/d Q 3.3908818 n/a AU   Orbit Determination Parameters    # obs. used (total)      555      first obs. used      1987-??-??      last obs. used      2013-02-06      # oppositions      15      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.108  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.1 mag n/a PDS3 (MPC 36243)   11890 (1991 FF)          Discovered 1991-Mar-18 by McNaught, R. H. at Siding Spring (413) Reference: 19991026/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 03:20 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin