+ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .206430460392935 8.2943e-08   a 2.652141780813546 1.8365e-08 au q 2.104658931972867 2.2705e-07 au i 28.62000204304006 7.7714e-06 deg node 76.64576472078176 9.9614e-06 deg peri 90.39536245610142 2.3215e-05 deg M 322.9432387982113 1.9827e-05 deg tp 2459162.889704270795 (2020-Nov-09.38970427) 8.7722e-05 TDB period 1577.587777278941 4.32 1.6386e-05 4.486e-08 d yr n .2281964941570073 2.3703e-09 deg/d Q 3.199624629654225 2.2156e-08 au   Orbit Determination Parameters    # obs. used (total)      826      data-arc span      9710 days (26.58 yr)      first obs. used      1994-04-05      last obs. used      2020-11-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51201      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:17:40   Additional Information  Earth MOID = 1.30794 au   Jupiter MOID = 2.32125 au   T_jup = 3.188  [ hide covariance matrix ] Orbital Elements at Epoch 2457128.5 (2015-Apr-16.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2069605851267793 8.3184e-08   q 2.102508314737099 2.2777e-07 au tp 2457586.618815430145 (2016-Jul-17.11881543) 8.036e-05 TDB node 76.67263927715038 9.9663e-06 deg peri 90.55434819547258 2.3101e-05 deg i 28.61726832074468 7.7705e-06 deg   Orbit Determination Parameters    # obs. used (total)      826      data-arc span      9710 days (26.58 yr)      first obs. used      1994-04-05      last obs. used      2020-11-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51201      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:17:40   Additional Information  Jupiter MOID = 2.32125 au   T_jup = 3.188  Orbit Covariance (6×6)   e q tp node peri i e 6.919510728122096E-15 -1.891678394559334E-14 3.575509035361346E-13 2.267664628698076E-14 6.926614205786649E-13 -3.828141103472246E-14 q -1.891678394559334E-14 5.188027747659879E-14 -5.559324431020748E-13 -6.238041595492693E-14 -1.805010606981855E-12 1.106766988061258E-13 tp 3.575509035361346E-13 -5.559324431020748E-13 6.457774834915585E-9 3.588346114493319E-13 1.582239407126609E-9 3.59532216421064E-11 node 2.267664628698076E-14 -6.238041595492693E-14 3.588346114493319E-13 9.932649434613466E-11 -8.420656217665931E-11 -9.61470077969092E-12 peri 6.926614205786649E-13 -1.805010606981855E-12 1.582239407126609E-9 -8.420656217665931E-11 5.336646119996125E-10 1.363654523185027E-11 i -3.828141103472246E-14 1.106766988061258E-13 3.59532216421064E-11 -9.61470077969092E-12 1.363654523185027E-11 6.038049297373074E-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 ] 2021-Jan-26 00:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin