+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23497 (1991 VG4) Classification: Main-belt Asteroid          SPK-ID: 2023497 [ 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 .1453607877904902 1.4722e-07   a 2.532289538074696 2.6649e-08 AU q 2.164193935906542 3.7795e-07 AU i 11.84504895697835 1.3671e-05 deg node 252.081488514333 4.6919e-05 deg peri 180.6847818827714 7.1195e-05 deg M 104.114659938856 5.0996e-05 deg tp 2455974.825286716305 (2012-Feb-17.32528672) 0.00020557 JED period 1471.866660008551 4.03 2.3234e-05 6.361e-08 d yr n .2445873731509813 3.8609e-09 deg/d Q 2.900385140242851 3.0522e-08 AU   Orbit Determination Parameters    # obs. used (total)      639      data-arc span      7836 days (21.45 yr)      first obs. used      1991-11-05      last obs. used      2013-04-19      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .48905      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:35:48   Additional Information  Earth MOID = 1.17823 AU   T_jup = 3.406  [ 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 14.0 mag n/a PDS3 (MPO 11104)   23497 (1991 VG4)          Discovered 1991-Nov-05 by Sugie, A. at Dynic (402) Reference: 20010408/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 VG4 = 1999 XC117  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-18 20:38 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin