+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   11902 (1991 PZ12) Classification: Main-belt Asteroid          SPK-ID: 2011902 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO233587 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1307449 n/a   a 2.4328132 n/a AU q 2.1147353 n/a AU i 5.55608 n/a deg node 322.09763 n/a deg peri 80.67687 n/a deg M 198.50351 n/a deg tp 2457022.2590921 (2014-Dec-30.75909210) n/a JED period 1385.9946625 3.79 n/a n/a d yr n 0.25974126 n/a deg/d Q 2.7508911 n/a AU   Orbit Determination Parameters    # obs. used (total)      730      first obs. used      1984-??-??      last obs. used      2012-06-11      # oppositions      14      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.488  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.0 mag n/a PDS3 (MPC 36247)   11902 (1991 PZ12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar (675) Reference: 19991026/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 PZ12 = 1984 WH1 = 1984 YF3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 01:17 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin