+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   85187 (1991 PC12) Classification: Main-belt Asteroid          SPK-ID: 2085187 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO244832 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.3661121 n/a   a 2.6828968 n/a AU q 1.7006558 n/a AU i 11.81608 n/a deg node 186.56704 n/a deg peri 101.32548 n/a deg M 358.02670 n/a deg tp 2456409.2982236 (2013-Apr-26.79822360) n/a JED period 1605.1084538 4.39 n/a n/a d yr n 0.22428391 n/a deg/d Q 3.6651378 n/a AU   Orbit Determination Parameters    # obs. used (total)      316      first obs. used      1991-??-??      last obs. used      2012-05-21      # oppositions      7      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.248  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.1 mag n/a MPO244832   85187 (1991 PC12)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar (675) Reference: 20040830/Numbers.arc Last Updated: 2004-09-06 Alternate Designations  1991 PC12 = 2000 RR5  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 08:51 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin