+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1366780021241291 3.6203e-08   a 3.21099418850019 2.1593e-08 au q 2.772121917983795 1.2063e-07 au i 5.913213689152382 4.5534e-06 deg node 133.0099381627297 4.3651e-05 deg peri 281.3240626284816 4.9435e-05 deg M 37.29564697727192 2.0046e-05 deg tp 2458982.772467477931 (2020-May-13.27246748) 0.00011707 TDB period 2101.637002187169 5.75 2.1199e-05 5.804e-08 d yr n .171295042685939 1.7279e-09 deg/d Q 3.649866459016585 2.4544e-08 au   Orbit Determination Parameters    # obs. used (total)      714      data-arc span      9749 days (26.69 yr)      first obs. used      1994-06-10      last obs. used      2021-02-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51562      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 20:03:12   Additional Information  Earth MOID = 1.79074 au   Jupiter MOID = 1.72904 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 ] 2021-Apr-23 06:21 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin