+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   187021 (2005 AU66) Classification: Jupiter Trojan          SPK-ID: 2187021 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1391748417434702 7.2173e-08   a 5.205359709101069 1.4578e-07 au q 4.480904595369092 4.6308e-07 au i 10.11472104299576 5.0319e-06 deg node 128.1918277410594 4.0114e-05 deg peri 161.226048908095 4.7729e-05 deg M 317.8216924936306 2.8718e-05 deg tp 2459708.731049698239 (2022-May-09.23104970) 0.00035241 TDB period 4337.850158253418 11.88 0.00018223 4.989e-07 d yr n .08299041849452669 3.4864e-09 deg/d Q 5.929814822833047 1.6607e-07 au   Orbit Determination Parameters    # obs. used (total)      365      data-arc span      10252 days (28.07 yr)      first obs. used      1993-01-23      last obs. used      2021-02-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55726      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:53:41   Additional Information  Earth MOID = 3.46467 au   Jupiter MOID = .414636 au   T_jup = 2.950  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.81   n/a E2021B55   diameter diameter 12.807 km 0.845 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   geometric albedo albedo 0.082   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)   187021 (2005 AU66)          Discovered 2005-Jan-13 by Spacewatch at Kitt Peak Reference: 20080520/Numbers.arc Last Updated: 2008-05-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 11:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin