+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   85947 (1999 ET11) Classification: Main-belt Asteroid          SPK-ID: 2085947 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2064304573034446 8.3094e-08   a 2.652141781696025 1.8417e-08 au q 2.104658940866942 2.2751e-07 au i 28.62000208573153 7.7788e-06 deg node 76.64576470744872 9.9616e-06 deg peri 90.39536279390859 2.3221e-05 deg M 322.9432379891012 1.987e-05 deg tp 2459162.889707897519 (2020-Nov-09.38970790) 8.7919e-05 TDB period 1577.587778066336 4.32 1.6433e-05 4.499e-08 d yr n .2281964940431115 2.377e-09 deg/d Q 3.199624622525108 2.2219e-08 au   Orbit Determination Parameters    # obs. used (total)      822      data-arc span      9521 days (26.07 yr)      first obs. used      1994-04-05      last obs. used      2020-04-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51295      source      ORB      producer      Otto Matic      solution date      2020-May-20 15:41:17   Additional Information  Earth MOID = 1.30794 au   Jupiter MOID = 2.32125 au   T_jup = 3.188  [ hide covariance matrix ] Orbital Elements at Epoch 2457125.5 (2015-Apr-13.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2069586111433643 8.3334e-08   q 2.102518550238966 2.2823e-07 au tp 2457586.618355874251 (2016-Jul-17.11835587) 8.0496e-05 TDB node 76.67269325887692 9.9665e-06 deg peri 90.55372609224112 2.3108e-05 deg i 28.61723195646276 7.778e-06 deg   Orbit Determination Parameters    # obs. used (total)      822      data-arc span      9521 days (26.07 yr)      first obs. used      1994-04-05      last obs. used      2020-04-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51295      source      ORB      producer      Otto Matic      solution date      2020-May-20 15:41:17   Additional Information  Jupiter MOID = 2.32125 au   T_jup = 3.188  Orbit Covariance (6×6)   e q tp node peri i e 6.944635173739828E-15 -1.898898682830881E-14 3.342848181253864E-13 2.28009627696557E-14 6.8985409945854E-13 -3.871839034526273E-14 q -1.898898682830881E-14 5.208775215968428E-14 -4.891678982789978E-13 -6.273614700537093E-14 -1.796968072652748E-12 1.119159703249688E-13 tp 3.342848181253864E-13 -4.891678982789978E-13 6.479625110633834E-9 2.603146057480375E-13 1.584896157016196E-9 3.626776134337433E-11 node 2.28009627696557E-14 -6.273614700537093E-14 2.603146057480375E-13 9.933062512657275E-11 -8.422032678171505E-11 -9.636015549387672E-12 peri 6.8985409945854E-13 -1.796968072652748E-12 1.584896157016196E-9 -8.422032678171505E-11 5.339923785129913E-10 1.368488116470169E-11 i -3.871839034526273E-14 1.119159703249688E-13 3.626776134337433E-11 -9.636015549387672E-12 1.368488116470169E-11 6.049684975961909E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.3   n/a MPO267963   diameter diameter 7.591 km 0.310 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   geometric albedo albedo 0.064   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)   85947 (1999 ET11)          Discovered 1999-Mar-12 by LINEAR at Socorro Reference: 20040830/Numbers.arc Last Updated: 2004-09-06 Alternate Designations  1999 ET11 = 2002 TP266  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-29 23:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin