+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   31111 (1997 PN5) Classification: Main-belt Asteroid          SPK-ID: 2031111 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1939104166144793 1.0062e-07   a 2.621241938992702 2.8199e-08 AU q 2.112955822555281 2.6336e-07 AU i 12.13167149968493 9.9272e-06 deg node 293.2458350154224 3.5902e-05 deg peri 93.3803937610238 4.5576e-05 deg M 198.2212441192935 2.8309e-05 deg tp 2457097.091353151454 (2015-Mar-15.59135315) 0.00012711 JED period 1550.097760174643 4.24 2.5014e-05 6.848e-08 d yr n .2322434166729203 3.7477e-09 deg/d Q 3.129528055430122 3.3667e-08 AU   Orbit Determination Parameters    # obs. used (total)      707      data-arc span      5765 days (15.78 yr)      first obs. used      1997-06-29      last obs. used      2013-04-11      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .51606      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:56:55   Additional Information  Earth MOID = 1.15802 AU   T_jup = 3.347  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.4 mag n/a PDS3 (MPO 18647)   31111 (1997 PN5)          Discovered 1997-Aug-11 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905) Reference: 20011130/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 09:46 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin