+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   66239 (1999 FK2) Classification: Main-belt Asteroid          SPK-ID: 2066239 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05304324027805092 4.1683e-08   a 2.945886551677122 2.0998e-08 au q 2.789627183484633 1.2285e-07 au i 11.59250600135951 5.8631e-06 deg node 352.9250618818218 2.2731e-05 deg peri 58.48434928670695 6.4128e-05 deg M 184.9298008680005 6.2579e-05 deg tp 2459898.615472902277 (2022-Nov-15.11547290) 0.00032458 TDB period 1846.811004087803 5.06 1.9746e-05 5.406e-08 d yr n .1949306123924766 2.0841e-09 deg/d Q 3.10214591986961 2.2112e-08 au   Orbit Determination Parameters    # obs. used (total)      767      data-arc span      8677 days (23.76 yr)      first obs. used      1996-09-11      last obs. used      2020-06-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56252      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:18:49   Additional Information  Earth MOID = 1.81608 au   Jupiter MOID = 2.10326 au   T_jup = 3.238  [ 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 14.5   n/a MPO468587   diameter diameter 6.156 km 0.280 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.097   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   66239 (1999 FK2)          Discovered 1999-Mar-16 by Spacewatch at Kitt Peak Reference: 20030910/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 FK2 = 2001 QY54  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-22 14:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin