+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   8514 (1991 PK15) Classification: Main-belt Asteroid          SPK-ID: 2008514 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO256927 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2321209 n/a   a 2.5839062 n/a AU q 1.9841276 n/a AU i 3.90085 n/a deg node 320.85260 n/a deg peri 19.88200 n/a deg M 76.10286 n/a deg tp 2456079.7903523 (2012-Jun-01.29035230) n/a JED period 1517.0976910 4.15 n/a n/a d yr n 0.23729520 n/a deg/d Q 3.1836848 n/a AU   Orbit Determination Parameters    # obs. used (total)      705      first obs. used      1954-??-??      last obs. used      2013-03-12      # oppositions      17      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.381  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.7 mag n/a PDS3 (MPC 31499)   8514 (1991 PK15)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar (675) Reference: 19980313/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 PK15 = 1987 UE2  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 11:22 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin