+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101715 (1999 DT4) Classification: Main-belt Asteroid          SPK-ID: 2101715 [ 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 .1936737996081835 5.5833e-08   a 3.130662681938495 2.9222e-08 au q 2.52433534503592 1.7939e-07 au i 14.32389548557688 6.2803e-06 deg node 219.2629753851048 1.9267e-05 deg peri 346.7385306524232 2.3002e-05 deg M 262.3401126127945 1.4905e-05 deg tp 2459549.366291974241 (2021-Nov-30.86629197) 8.8708e-05 TDB period 2023.265338483419 5.54 2.8328e-05 7.756e-08 d yr n .1779301968716795 2.4913e-09 deg/d Q 3.736990018841069 3.4882e-08 au   Orbit Determination Parameters    # obs. used (total)      519      data-arc span      7937 days (21.73 yr)      first obs. used      1999-01-23      last obs. used      2020-10-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5545      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:58:53   Additional Information  Earth MOID = 1.52165 au   Jupiter MOID = 1.25581 au   T_jup = 3.137  [ 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 14.6   n/a MPO422324   diameter diameter 6.651 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.058   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101715 (1999 DT4)          Discovered 1999-Feb-17 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 DT4 = 2000 LC4 = 2001 US181  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-26 22:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin