+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101712 (1999 DU2) Classification: Main-belt Asteroid          SPK-ID: 2101712 [ 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 .07106748827159906 3.9012e-08   a 2.522916808615561 1.1621e-08 au q 2.343619447909054 9.8299e-08 au i 3.706773052104424 4.1041e-06 deg node 32.14044453756323 6.5113e-05 deg peri 210.2453247866255 7.6949e-05 deg M 73.8958367808942 4.3577e-05 deg tp 2458900.051325221025 (2020-Feb-20.55132522) 0.00017732 TDB period 1463.702525504066 4.01 1.0114e-05 2.769e-08 d yr n .245951614981346 1.6994e-09 deg/d Q 2.702214169322067 1.2447e-08 au   Orbit Determination Parameters    # obs. used (total)      1319      data-arc span      8271 days (22.64 yr)      first obs. used      1997-10-29      last obs. used      2020-06-21      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52081      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:38:11   Additional Information  Earth MOID = 1.33029 au   Jupiter MOID = 2.29251 au   T_jup = 3.449  [ 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 14.87   n/a E2021B55   diameter diameter 3.311 km 1.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.233   0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   101712 (1999 DU2)          Discovered 1999-Feb-20 by Kobayashi, T. at Oizumi Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1999 DU2 = 1997 WT27  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 07:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin