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312390 (2008 ER147)
Classification: Main-belt Asteroid          SPK-ID: 2312390
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03640555528120654 4.9256e-08  
a 2.761427202554553 2.8353e-08 au
q 2.660895911876926 1.3737e-07 au
i 6.341907210617042 6.614e-06 deg
node 172.2431520831254 4.4885e-05 deg
peri 248.7325188821231 0.00010297 deg
M 38.57942802957832 9.0101e-05 deg
tp 2459020.881068407847
(2020-Jun-20.38106841)
0.00041974 TDB
period 1676.095750398347
4.59
2.5814e-05
7.067e-08
d
yr
n .214784865312403 3.3079e-09 deg/d
Q 2.86195849323218 2.9385e-08 au
  Orbit Determination Parameters
   # obs. used (total)      202  
   data-arc span      6540 days (17.91 yr)  
   first obs. used      2003-02-22  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5538  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:29:46  

Additional Information
 Earth MOID = 1.6792 au 
 Jupiter MOID = 2.24757 au 
 T_jup = 3.331 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457216.5 (2015-Jul-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03498103193487864 5.0169e-08  
q 2.664288130154736 1.3942e-07 au
tp 2457329.182205025401
(2015-Nov-02.68220503)
0.0004371 TDB
node 172.3219072469298 4.4803e-05 deg
peri 245.3215356363057 0.00010571 deg
i 6.346809793076798 6.6215e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      202  
   data-arc span      6540 days (17.91 yr)  
   first obs. used      2003-02-22  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5538  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 06:29:46  

Additional Information
 Jupiter MOID = 2.24757 au 
 T_jup = 3.331 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.51692872638612E-15 -6.859249673111652E-15 -7.667259791513076E-12 9.273613032068771E-15 -1.67918227432225E-12 -4.194121364144623E-15
q -6.859249673111652E-15 1.943875114670464E-14 1.946278526212827E-11 -2.685753428094024E-14 4.252298110377393E-12 1.246478497641845E-14
tp -7.667259791513076E-12 1.946278526212827E-11 1.910553666230891E-7 -7.993985350733057E-11 4.187076507477459E-8 1.550080386324874E-11
node 9.273613032068771E-15 -2.685753428094024E-14 -7.993985350733057E-11 2.007305685665081E-9 -2.01189980759991E-9 4.784046457869675E-11
peri -1.67918227432225E-12 4.252298110377393E-12 4.187076507477459E-8 -2.01189980759991E-9 1.117369068636539E-8 -4.423339489651605E-11
i -4.194121364144623E-15 1.246478497641845E-14 1.550080386324874E-11 4.784046457869675E-11 -4.423339489651605E-11 4.384389301622886E-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 16.66   n/a MPCxxxxx  

312390 (2008 ER147)          Discovered 2008-Mar-01 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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