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305493 (2008 EQ40)
Classification: Main-belt Asteroid          SPK-ID: 2305493
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .159185522515953 4.9597e-08  
a 3.131155618980533 3.5095e-08 au
q 2.632720975694355 1.5633e-07 au
i 8.382702018605235 7.8169e-06 deg
node 211.9778932075847 3.733e-05 deg
peri 277.3814953704791 4.8575e-05 deg
M 114.9707022524096 2.7305e-05 deg
tp 2458354.191170295419
(2018-Aug-23.69117030)
0.00015193 TDB
period 2023.743215752802
5.54
3.4024e-05
9.315e-08
d
yr
n .177888181266162 2.9907e-09 deg/d
Q 3.629590262266712 4.0681e-08 au
  Orbit Determination Parameters
   # obs. used (total)      182  
   data-arc span      6783 days (18.57 yr)  
   first obs. used      2000-10-07  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58333  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 09:08:17  

Additional Information
 Earth MOID = 1.66392 au 
 Jupiter MOID = 1.55719 au 
 T_jup = 3.177 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457127.5 (2015-Apr-15.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1605757663830439 4.9755e-08  
q 2.62631573216747 1.5742e-07 au
tp 2456330.111490395036
(2013-Feb-06.61149039)
0.00015054 TDB
node 212.0282547621391 3.7312e-05 deg
peri 276.7992718155389 4.8325e-05 deg
i 8.387291179105794 7.8214e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      182  
   data-arc span      6783 days (18.57 yr)  
   first obs. used      2000-10-07  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58333  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 09:08:17  

Additional Information
 Jupiter MOID = 1.55719 au 
 T_jup = 3.177 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.475538950277212E-15 -7.687373370284307E-15 -1.160871190564661E-12 -1.634313068529982E-15 -3.081945928098519E-13 -6.079601484737328E-15
q -7.687373370284307E-15 2.478018594887164E-14 3.033752472189777E-12 -1.69243738468501E-15 9.311526043286493E-13 1.932714408241664E-14
tp -1.160871190564661E-12 3.033752472189777E-12 2.266143659843157E-8 -6.815864031359027E-14 4.619033394549747E-9 2.770090796768163E-12
node -1.634313068529982E-15 -1.69243738468501E-15 -6.815864031359027E-14 1.392155776818379E-9 -1.377903814187905E-9 6.33397642087272E-12
peri -3.081945928098519E-13 9.311526043286493E-13 4.619033394549747E-9 -1.377903814187905E-9 2.335349943907823E-9 -5.494057571543989E-12
i -6.079601484737328E-15 1.932714408241664E-14 2.770090796768163E-12 6.33397642087272E-12 -5.494057571543989E-12 6.117431300712477E-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 15.9   n/a MPO433969  

305493 (2008 EQ40)          Discovered 2008-Mar-04 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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