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308218 (2005 EQ149)
Classification: Main-belt Asteroid          SPK-ID: 2308218
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1079277265352182 8.1758e-08  
a 2.582307750137089 2.9075e-08 au
q 2.303605145450519 1.9904e-07 au
i 10.96832986655328 6.9358e-06 deg
node 26.81929488441494 3.6259e-05 deg
peri 249.7042088665928 4.7274e-05 deg
M 164.0464286411963 3.4179e-05 deg
tp 2458309.823460876370
(2018-Jul-10.32346088)
0.00013803 TDB
period 1515.690138115363
4.15
2.5599e-05
7.009e-08
d
yr
n .2375155653170842 4.0115e-09 deg/d
Q 2.86101035482366 3.2214e-08 au
  Orbit Determination Parameters
   # obs. used (total)      136  
   data-arc span      7794 days (21.34 yr)  
   first obs. used      1998-09-17  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57063  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:15:52  

Additional Information
 Earth MOID = 1.31507 au 
 Jupiter MOID = 2.26893 au 
 T_jup = 3.390 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457246.5 (2015-Aug-12.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1088859691590904 8.1441e-08  
q 2.300449309942284 1.9833e-07 au
tp 2456796.163779931887
(2014-May-18.66377993)
0.00012726 TDB
node 26.83258126199172 3.6243e-05 deg
peri 250.0098713899554 4.7156e-05 deg
i 10.97316642390724 6.936e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      136  
   data-arc span      7794 days (21.34 yr)  
   first obs. used      1998-09-17  
   last obs. used      2020-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57063  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 18:15:52  

Additional Information
 Jupiter MOID = 2.26893 au 
 T_jup = 3.390 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.632639518475634E-15 -1.605140656969502E-14 1.019902001110465E-12 -9.196976879030097E-15 1.154791104868578E-13 -2.678190712467863E-14
q -1.605140656969502E-14 3.93360798417866E-14 -1.644258644252789E-12 2.495831301580486E-14 -5.71883219012315E-14 6.631530372186171E-14
tp 1.019902001110465E-12 -1.644258644252789E-12 1.619498085662889E-8 6.015636814999863E-11 3.88371966534377E-9 -1.264966932666295E-11
node -9.196976879030097E-15 2.495831301580486E-14 6.015636814999863E-11 1.313529585863911E-9 -1.274183743443622E-9 5.250685359207786E-11
peri 1.154791104868578E-13 -5.71883219012315E-14 3.88371966534377E-9 -1.274183743443622E-9 2.223693350313702E-9 -5.369122664250082E-11
i -2.678190712467863E-14 6.631530372186171E-14 -1.264966932666295E-11 5.250685359207786E-11 -5.369122664250082E-11 4.81080288273749E-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 16.8   n/a MPO408221  

308218 (2005 EQ149)          Discovered 2005-Mar-10 by Spacewatch at Kitt Peak
Reference: 20111210/Numbers.arcLast Updated: 2011-12-12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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