+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9959 (1991 VF2) Classification: Main-belt Asteroid          SPK-ID: 2009959 [ 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 .1398906934724984 6.0071e-08   a 2.243850125188243 1.4783e-08 AU q 1.929956375127307 1.369e-07 AU i 5.648882163451929 9.4368e-06 deg node 216.2378745732007 6.3018e-05 deg peri 246.9573945019849 7.3112e-05 deg M 98.83461762266903 3.8344e-05 deg tp 2456063.448875289470 (2012-May-15.94887529) 0.00012929 JED period 1227.691347570512 3.36 1.2132e-05 3.322e-08 d yr n .2932333120310791 2.8978e-09 deg/d Q 2.557743875249179 1.6851e-08 AU   Orbit Determination Parameters    # obs. used (total)      769      data-arc span      8817 days (24.14 yr)      first obs. used      1989-03-02      last obs. used      2013-04-22      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .54152      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:37:54   Additional Information  Earth MOID = .954319 AU   T_jup = 3.613  [ 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 14.7 mag n/a PDS3 (MPC 33661)   9959 (1991 VF2)          Discovered 1991-Nov-09 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 19990202/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 VF2 = 1989 EZ3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 09:36 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin