+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   109376 (2001 QE163) Classification: Main-belt Asteroid          SPK-ID: 2109376 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .116338249509548 3.9492e-08   a 2.65828020609511 1.5063e-08 au q 2.349020540212125 1.0555e-07 au i 14.26872692488394 5.4769e-06 deg node 341.5572266444848 1.5391e-05 deg peri 290.2895336244443 2.8704e-05 deg M 174.357077127737 2.4862e-05 deg tp 2458233.780264294200 (2018-Apr-25.28026429) 0.00010733 TDB period 1583.067974074099 4.33 1.3456e-05 3.684e-08 d yr n .2274065333237229 1.9329e-09 deg/d Q 2.967539871978096 1.6816e-08 au   Orbit Determination Parameters    # obs. used (total)      744      data-arc span      7242 days (19.83 yr)      first obs. used      2000-03-30      last obs. used      2020-01-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54075      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 03:24:26   Additional Information  Earth MOID = 1.37663 au   Jupiter MOID = 2.31923 au   T_jup = 3.333  [ 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 15.1   n/a MPO453553   diameter diameter 2.556 km 0.723 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.296   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   109376 (2001 QE163)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-15 14:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin