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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2061730709029706 4.1261e-08  
a 2.651405146547576 1.2714e-08 au
q 2.104756805275922 1.0517e-07 au
i 28.61984565548471 6.708e-06 deg
node 76.64030619501925 8.5153e-06 deg
peri 90.38593972869174 2.2649e-05 deg
M 53.34164391231815 1.8304e-05 deg
tp 2459162.844254616159
(2020-Nov-09.34425462)
7.9572e-05 TDB
period 1576.930558729143
4.32
1.1343e-05
3.106e-08
d
yr
n .2282915997836493 1.6421e-09 deg/d
Q 3.19805348781923 1.5336e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1232  
   data-arc span      9947 days (27.23 yr)  
   first obs. used      1994-04-05  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46971  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 08:51:45  

Additional Information
 Earth MOID = 1.30853 au 
 Jupiter MOID = 2.3199 au 
 T_jup = 3.189 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457876.5 (2017-May-03.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2071486713653115 4.1369e-08  
q 2.102004762001018 1.0568e-07 au
tp 2457586.344393932160
(2016-Jul-16.84439393)
7.5764e-05 TDB
node 76.64983803400391 8.5167e-06 deg
peri 90.49491629789757 2.2524e-05 deg
i 28.62143495847762 6.7084e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1232  
   data-arc span      9947 days (27.23 yr)  
   first obs. used      1994-04-05  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46971  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 08:51:45  

Additional Information
 Jupiter MOID = 2.3199 au 
 T_jup = 3.189 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.711424868653595E-15 -4.356000737957102E-15 1.822804883293701E-12 -1.001245696854157E-14 5.271584041836234E-13 -1.154077551743753E-14
q -4.356000737957102E-15 1.116724874298164E-14 -4.679821021757934E-12 2.512561651789935E-14 -1.344816868209565E-12 3.05909042087946E-14
tp 1.822804883293701E-12 -4.679821021757934E-12 5.740254670890861E-9 -2.731883521872934E-11 1.590798152371719E-9 -1.74616273418144E-11
node -1.001245696854157E-14 2.512561651789935E-14 -2.731883521872934E-11 7.253470189135095E-11 -7.084686605850113E-11 -2.47826406385299E-11
peri 5.271584041836234E-13 -1.344816868209565E-12 1.590798152371719E-9 -7.084686605850113E-11 5.073427250966461E-10 1.717752737753397E-11
i -1.154077551743753E-14 3.05909042087946E-14 -1.74616273418144E-11 -2.47826406385299E-11 1.717752737753397E-11 4.500275945999924E-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 14.42   n/a MPO614063  
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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