+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   134868 (2000 QE21) Classification: Outer Main-belt Asteroid          SPK-ID: 2134868 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0884211330829625 5.5742e-08   a 3.364657593145847 2.7688e-08 au q 3.067150756323698 1.8549e-07 au i 12.61325525710018 5.8731e-06 deg node 169.4309020234153 2.135e-05 deg peri 204.4131678166427 3.3297e-05 deg M 80.49251715590648 2.5178e-05 deg tp 2458696.462618523021 (2019-Jul-31.96261852) 0.0001571 TDB period 2254.289761870089 6.17 2.7826e-05 7.618e-08 d yr n .1596955307561505 1.9712e-09 deg/d Q 3.662164429967997 3.0136e-08 au   Orbit Determination Parameters    # obs. used (total)      579      data-arc span      9631 days (26.37 yr)      first obs. used      1994-09-05      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56494      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 10:00:59   Additional Information  Earth MOID = 2.06953 au   Jupiter MOID = 1.8061 au   T_jup = 3.110  [ 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 14.6   n/a MPO417708   diameter diameter 7.936 km 0.372 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.036   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   134868 (2000 QE21)          Discovered 2000-Aug-24 by LINEAR at Socorro Reference: 20060907/Numbers.arc Last Updated: 2006-09-10 [ show close-approach data ] Alternate Designations  2000 QE21 = 1994 RY4 = 1997 EX43  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 13:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin