+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   10309 (1990 QC6) Classification: Main-belt Asteroid          SPK-ID: 2010309 [ 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 .1849309613586767 6.1336e-08   a 2.327815628402171 1.5133e-08 AU q 1.897330446376005 1.4225e-07 AU i .6853349171879092 5.8341e-06 deg node 92.23148589950044 0.00055983 deg peri 316.65726602242 0.00056016 deg M 83.9736426997238 1.9564e-05 deg tp 2456097.904971548976 (2012-Jun-19.40497155) 6.9109e-05 JED period 1297.242881696819 3.55 1.265e-05 3.463e-08 d yr n .2775116403252975 2.7061e-09 deg/d Q 2.758300810428337 1.7931e-08 AU   Orbit Determination Parameters    # obs. used (total)      950      data-arc span      8277 days (22.66 yr)      first obs. used      1990-08-16      last obs. used      2013-04-14      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .63212      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:39:26   Additional Information  Earth MOID = .906833 AU   T_jup = 3.550  [ 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 14.8 mag n/a PDS3 (MPC 34138)   10309 (1990 QC6)          Discovered 1990-Aug-23 by Holt, H. E. at Palomar (675) Reference: 19990402/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 QC6 = 1996 HD9  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 04:54 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin