+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   173729 (2001 QU216) Classification: Main-belt Asteroid          SPK-ID: 2173729 [ 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 .09919180328081578 4.0627e-08   a 2.807839518105063 1.5026e-08 au q 2.529324852981085 1.1164e-07 au i 3.968929844284094 5.8852e-06 deg node 14.71633726425767 5.1201e-05 deg peri 303.943557200743 5.8986e-05 deg M 15.64235803049502 2.734e-05 deg tp 2458925.828208436411 (2020-Mar-17.32820844) 0.0001305 TDB period 1718.528939849454 4.71 1.3795e-05 3.777e-08 d yr n .2094814882963429 1.6816e-09 deg/d Q 3.086354183229042 1.6517e-08 au   Orbit Determination Parameters    # obs. used (total)      526      data-arc span      7028 days (19.24 yr)      first obs. used      2001-08-18      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50909      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 05:08:03   Additional Information  Earth MOID = 1.51903 au   Jupiter MOID = 2.17966 au   T_jup = 3.312  [ 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 15.7   n/a MPO436862   173729 (2001 QU216)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa Reference: 20080122/Numbers.arc Last Updated: 2008-01-28 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-21 19:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin