+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160884 (2001 QT39) Classification: Outer Main-belt Asteroid          SPK-ID: 2160884 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ 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 .1364434303735946 4.5897e-08   a 3.210152813083434 2.595e-08 au q 2.772148551242886 1.5862e-07 au i 5.913095577283197 5.0914e-06 deg node 133.0119184644787 5.2817e-05 deg peri 281.3171619659096 5.7955e-05 deg M 3.043669902611842 2.1954e-05 deg tp 2458982.738402022527 (2020-May-13.23840202) 0.00012807 TDB period 2100.811019750615 5.75 2.5474e-05 6.974e-08 d yr n .171362391293404 2.0779e-09 deg/d Q 3.648157074923983 2.9491e-08 au   Orbit Determination Parameters    # obs. used (total)      563      data-arc span      9361 days (25.63 yr)      first obs. used      1994-06-10      last obs. used      2020-01-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53039      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 13:26:52   Additional Information  Earth MOID = 1.79153 au   Jupiter MOID = 1.72999 au   T_jup = 3.169  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.8   n/a MPO412929   diameter diameter 6.340 km 0.323 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.048   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   160884 (2001 QT39)          Discovered 2001-Aug-16 by LINEAR at Socorro Reference: 20070828/Numbers.arc Last Updated: 2007-08-30 [ show close-approach data ] Alternate Designations  2001 QT39 = 2002 UP26  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-05 11:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin