+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   17481 (1991 PE11) Classification: Main-belt Asteroid          SPK-ID: 2017481 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO229174 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1725045 n/a   a 2.7293206 n/a AU q 2.2585005 n/a AU i 4.78337 n/a deg node 340.67543 n/a deg peri 9.32157 n/a deg M 278.76151 n/a deg tp 2456772.1546741 (2014-Apr-24.65467410) n/a JED period 1646.9494037 4.51 n/a n/a d yr n 0.21858595 n/a deg/d Q 3.2001407 n/a AU   Orbit Determination Parameters    # obs. used (total)      737      first obs. used      1991-??-??      last obs. used      2012-04-29      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.328  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.4 mag n/a PDS3 (MPO 4063)   17481 (1991 PE11)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar (675) Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 PE11 = 1999 JS105  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-20 14:32 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin