+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   117161 (2004 QT17) Classification: Main-belt Asteroid          SPK-ID: 2117161 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2643529684638675 6.4771e-08   a 2.866113247253806 2.2233e-08 au q 2.108447702388648 1.8167e-07 au i 13.19547488610712 6.982e-06 deg node 241.8533984226208 2.4494e-05 deg peri 129.7979026673642 2.894e-05 deg M 89.69782892172495 2.0828e-05 deg tp 2458558.911375631036 (2019-Mar-16.41137563) 9.8729e-05 TDB period 1772.304934064284 4.85 2.0622e-05 5.646e-08 d yr n .203125316124038 2.3635e-09 deg/d Q 3.623778792118964 2.811e-08 au   Orbit Determination Parameters    # obs. used (total)      576      data-arc span      7897 days (21.62 yr)      first obs. used      1998-06-20      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52988      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 05:43:30   Additional Information  Earth MOID = 1.13698 au   Jupiter MOID = 1.99105 au   T_jup = 3.209  [ 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 14.7   n/a MPO453642   diameter diameter 3.358 km 0.740 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.226   0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   117161 (2004 QT17)          Discovered 2004-Aug-19 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  2004 QT17 = 1998 MZ14 = 2000 AC146  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-06 13:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin