+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   8512 (1991 PC11) Classification: Main-belt Asteroid          SPK-ID: 2008512 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250294 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1606980 n/a   a 2.6649701 n/a AU q 2.2367147 n/a AU i 7.19305 n/a deg node 146.08248 n/a deg peri 248.58468 n/a deg M 306.95002 n/a deg tp 2456634.6637491 (2013-Dec-08.16374910) n/a JED period 1589.0477181 4.35 n/a n/a d yr n 0.22655078 n/a deg/d Q 3.0932255 n/a AU   Orbit Determination Parameters    # obs. used (total)      988      first obs. used      1989-??-??      last obs. used      2012-09-02      # oppositions      14      planetary ephem.      DE403      condition code      0      fit RMS      0.58      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.354  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.7 mag n/a PDS3 (MPC 31499)   8512 (1991 PC11)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar (675) Reference: 19980313/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 PC11 = 1989 ES10 = 1996 XT32  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-20 12:31 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin