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85437 (1997 EX31)
Classification: Main-belt Asteroid          SPK-ID: 2085437
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1684096987479675 4.5858e-08  
a 2.276494649332806 1.1447e-08 au
q 1.893110871237308 1.0783e-07 au
i 7.621928996645587 5.172e-06 deg
node 182.8957334066526 2.6722e-05 deg
peri 17.77852084835798 3.0618e-05 deg
M 257.1374532665136 1.9735e-05 deg
tp 2459358.970275455314
(2021-May-24.47027546)
7.0937e-05 TDB
period 1254.580051359955
3.43
9.4625e-06
2.591e-08
d
yr
n .2869486085082915 2.1643e-09 deg/d
Q 2.659878427428303 1.3375e-08 au
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      8799 days (24.09 yr)  
   first obs. used      1995-10-26  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57025  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:02:19  

Additional Information
 Earth MOID = .892588 au 
 Jupiter MOID = 2.2967 au 
 T_jup = 3.578 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457054.5 (2015-Feb-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1683351762460441 4.5922e-08  
q 1.893190591264334 1.0793e-07 au
tp 2456850.214151459109
(2014-Jul-11.71415146)
5.684e-05 TDB
node 182.9183191399171 2.6711e-05 deg
peri 17.81374756413927 3.0609e-05 deg
i 7.623147208148874 5.1733e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      8799 days (24.09 yr)  
   first obs. used      1995-10-26  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57025  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:02:19  

Additional Information
 Jupiter MOID = 2.2967 au 
 T_jup = 3.578 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.108836500308035E-15 -4.93902251222893E-15 -1.02953566544823E-12 -2.671172061962659E-15 -2.641943291800902E-13 -6.520145978766281E-16
q -4.93902251222893E-15 1.164867515522492E-14 2.705781076598672E-12 6.490231751385014E-15 6.9512446973022E-13 1.667062178768204E-15
tp -1.02953566544823E-12 2.705781076598672E-12 3.230813063829713E-9 2.997473466779626E-12 8.580328978443567E-10 4.926221034262543E-13
node -2.671172061962659E-15 6.490231751385014E-15 2.997473466779626E-12 7.134708724686021E-10 -7.0584993513973E-10 -3.774741223869157E-13
peri -2.641943291800902E-13 6.9512446973022E-13 8.580328978443567E-10 -7.0584993513973E-10 9.369137446285937E-10 4.986256958234804E-13
i -6.520145978766281E-16 1.667062178768204E-15 4.926221034262543E-13 -3.774741223869157E-13 4.986256958234804E-13 2.676350235228972E-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 16.3   n/a MPO502665  

85437 (1997 EX31)          Discovered 1997-Mar-11 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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