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268990 (2007 EG91)
Classification: Main-belt Asteroid          SPK-ID: 2268990
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2390331571894641 6.6143e-08  
a 2.57224715950671 2.0576e-08 au
q 1.95739479989819 1.7154e-07 au
i 13.79133351084665 6.2771e-06 deg
node 111.8285063385425 1.711e-05 deg
peri 331.1991678933001 1.9743e-05 deg
M 136.9788168827778 1.0265e-05 deg
tp 2458427.151895107789
(2018-Nov-04.65189511)
4.1129e-05 TDB
period 1506.841148568479
4.13
1.808e-05
4.95e-08
d
yr
n .2389103857045617 2.8666e-09 deg/d
Q 3.18709951911523 2.5494e-08 au
  Orbit Determination Parameters
   # obs. used (total)      479  
   data-arc span      6288 days (17.22 yr)  
   first obs. used      2003-04-05  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50989  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 22:09:24  

Additional Information
 Earth MOID = .984399 au 
 Jupiter MOID = 2.06807 au 
 T_jup = 3.349 
[ show covariance matrix ]

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 16.2   n/a MPO418428  

268990 (2007 EG91)          Discovered 2007-Mar-09 by CSS at Catalina
Reference: 20110319/Numbers.arcLast Updated: 2011-03-23

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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