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85947 (1999 ET11)
Classification: Main-belt Asteroid          SPK-ID: 2085947
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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.arcLast Updated: 2004-09-06

Alternate Designations
 1999 ET11 = 2002 TP266 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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