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308434 (2005 ST157)
Classification: Main-belt Asteroid          SPK-ID: 2308434
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06012905691863464 5.1155e-08  
a 3.119555107410056 3.9406e-08 au
q 2.931979200795779 1.4845e-07 au
i 11.01926129941231 7.0412e-06 deg
node 24.490703967156 2.6394e-05 deg
peri 65.44772782962556 6.2781e-05 deg
M 176.1599603669966 5.6161e-05 deg
tp 2458015.713417292329
(2017-Sep-19.21341729)
0.00031507 TDB
period 2012.507093190634
5.51
3.8133e-05
1.044e-07
d
yr
n .1788813570983519 3.3894e-09 deg/d
Q 3.307131014024332 4.1775e-08 au
  Orbit Determination Parameters
   # obs. used (total)      230  
   data-arc span      4975 days (13.62 yr)  
   first obs. used      2005-09-26  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62456  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:17:09  

Additional Information
 Earth MOID = 1.96857 au 
 Jupiter MOID = 1.86208 au 
 T_jup = 3.185 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457278.5 (2015-Sep-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06240981816330231 5.1437e-08  
q 2.922176501299414 1.4984e-07 au
tp 2458013.282118210385
(2017-Sep-16.78211821)
0.00030129 TDB
node 24.55188716984393 2.6365e-05 deg
peri 64.64004474905886 6.0556e-05 deg
i 11.0300183517987 7.0464e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      230  
   data-arc span      4975 days (13.62 yr)  
   first obs. used      2005-09-26  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62456  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:17:09  

Additional Information
 Jupiter MOID = 1.86208 au 
 T_jup = 3.185 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.645750657055672E-15 -7.499098774409867E-15 -3.884328649160713E-12 -1.005591137935895E-14 -7.297073693661847E-13 -1.273105054882956E-15
q -7.499098774409867E-15 2.245247557655517E-14 1.097160562220348E-11 2.47592753216388E-14 1.982160135924754E-12 4.481927481022576E-15
tp -3.884328649160713E-12 1.097160562220348E-11 9.077448824552473E-8 9.805686405437267E-11 1.643405671621238E-8 -4.018612097599573E-12
node -1.005591137935895E-14 2.47592753216388E-14 9.805686405437267E-11 6.951337312472566E-10 -6.638868505753328E-10 -6.430276039723157E-12
peri -7.297073693661847E-13 1.982160135924754E-12 1.643405671621238E-8 -6.638868505753328E-10 3.66703488115109E-9 5.500811834215361E-12
i -1.273105054882956E-15 4.481927481022576E-15 -4.018612097599573E-12 -6.430276039723157E-12 5.500811834215361E-12 4.965108099496346E-11

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 15.6   n/a MPO471234  

308434 (2005 ST157)          Discovered 2005-Sep-26 by Spacewatch at Kitt Peak
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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