+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109171 (2001 QP64) Classification: Main-belt Asteroid          SPK-ID: 2109171 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1853811481449385 6.8702e-08   a 2.584857426458753 1.3556e-08 au q 2.105673588950859 1.7211e-07 au i 12.62323731804397 5.1884e-06 deg node 171.4742118318306 2.1527e-05 deg peri 238.1980293931203 2.4292e-05 deg M 138.6694453339903 1.0518e-05 deg tp 2458415.802017992278 (2018-Oct-24.30201799) 4.4108e-05 TDB period 1517.935497728457 4.16 1.1941e-05 3.269e-08 d yr n .2371642276886789 1.8657e-09 deg/d Q 3.064041263966648 1.6069e-08 au   Orbit Determination Parameters    # obs. used (total)      667      data-arc span      7720 days (21.14 yr)      first obs. used      1999-03-09      last obs. used      2020-04-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52806      source      ORB      producer      Otto Matic      solution date      2020-May-20 19:01:38   Additional Information  Earth MOID = 1.14348 au   Jupiter MOID = 2.4421 au   T_jup = 3.365  [ 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 15.4   n/a MPO453551   109171 (2001 QP64)          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-Aug-03 12:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin