+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07069899288900182 3.9121e-08   a 2.52301328426575 1.1398e-08 au q 2.344638786022589 9.8122e-08 au i 3.706969567348414 4.1194e-06 deg node 32.18986986183072 6.5105e-05 deg peri 210.4789155906757 7.7021e-05 deg M 24.47923425492343 4.3747e-05 deg tp 2458900.965632685280 (2020-Feb-21.46563269) 0.00017796 TDB period 1463.786483684325 4.01 9.9192e-06 2.716e-08 d yr n .2459375079717134 1.6666e-09 deg/d Q 2.701387782508911 1.2204e-08 au   Orbit Determination Parameters    # obs. used (total)      1308      data-arc span      8271 days (22.64 yr)      first obs. used      1997-10-29      last obs. used      2020-06-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5205      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 19:58:54   Additional Information  Earth MOID = 1.33273 au   Jupiter MOID = 2.29479 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 14.8   n/a MPO337994   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-Jan-23 17:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin