+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109068 (2001 QT21) Classification: Main-belt Asteroid          SPK-ID: 2109068 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2736715007380699 9.789e-08   a 2.548238521111062 1.4121e-08 au q 1.850858260800038 2.5647e-07 au i 4.610423129563962 7.7969e-06 deg node 354.9752321791281 5.7013e-05 deg peri 315.4991447316191 5.7604e-05 deg M 241.7600164131148 9.853e-06 deg tp 2459488.500651375507 (2021-Oct-01.00065138) 4.3239e-05 TDB period 1485.793799743631 4.07 1.2351e-05 3.382e-08 d yr n .2422947249222045 2.0141e-09 deg/d Q 3.245618781422086 1.7986e-08 au   Orbit Determination Parameters    # obs. used (total)      534      data-arc span      9683 days (26.51 yr)      first obs. used      1993-10-13      last obs. used      2020-04-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5969      source      ORB      producer      Otto Matic      solution date      2020-May-20 19:00:29   Additional Information  Earth MOID = .840107 au   Jupiter MOID = 2.05817 au   T_jup = 3.384  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.5   n/a MPO432614   109068 (2001 QT21)          Discovered 2001-Aug-16 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Sep-25 03:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin