+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1935360360136464 4.9154e-08   a 3.130832460552854 2.5459e-08 au q 2.524903556714604 1.646e-07 au i 14.32270248973206 4.6158e-06 deg node 219.2534778615655 1.917e-05 deg peri 346.7262793186832 2.2672e-05 deg M 297.9305583428066 1.364e-05 deg tp 2459549.369904818551 (2021-Nov-30.86990482) 7.902e-05 TDB period 2023.429925925926 5.54 2.4681e-05 6.757e-08 d yr n .1779157238841682 2.1701e-09 deg/d Q 3.736761364391105 3.0386e-08 au   Orbit Determination Parameters    # obs. used (total)      718      data-arc span      8087 days (22.14 yr)      first obs. used      1999-01-23      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51365      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:38:12   Additional Information  Earth MOID = 1.52132 au   Jupiter MOID = 1.2549 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 14.74   n/a E2021B55   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 ] 2021-Apr-18 06:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin