+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   7419 (1991 PN13) Classification: Main-belt Asteroid          SPK-ID: 2007419 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO87241 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1860023 n/a   a 2.6573218 n/a AU q 2.1630538 n/a AU i 12.46080 n/a deg node 335.50086 n/a deg peri 47.73391 n/a deg M 324.41547 n/a deg tp 2456556.8951885 (2013-Sep-21.39518850) n/a JED period 1582.2119296 4.33 n/a n/a d yr n 0.22752957 n/a deg/d Q 3.1515898 n/a AU   Orbit Determination Parameters    # obs. used (total)      422      first obs. used      1950-??-??      last obs. used      2005-10-07      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.60      data source      MPC:mpn      producer      MPCW   Additional Information  T_jup = 3.329  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.3 mag n/a PDS3 (MPC 28831)   7419 (1991 PN13)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar (675) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1991 PN13 = 1983 XJ1 = 1987 SW14 = 1990 HX2  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 18:43 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin