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22311 (1991 EF2)
Classification: Main-belt Asteroid          SPK-ID: 2022311
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05622072367459847 6.0333e-08  
a 2.196739727199375 9.0415e-09 au
q 2.073237430011486 1.3116e-07 au
i 5.427140614104497 6.0064e-06 deg
node 175.7625600782342 4.198e-05 deg
peri 18.59550231722966 5.4604e-05 deg
M 200.0925649558082 3.5739e-05 deg
tp 2457928.741465910424
(2017-Jun-24.24146591)
0.00011847 JED
period 1189.231305443667
3.26
7.3421e-06
2.01e-08
d
yr
n .3027165517356565 1.8689e-09 deg/d
Q 2.320242024387264 9.5498e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1320  
   data-arc span      9074 days (24.84 yr)  
   first obs. used      1991-02-09  
   last obs. used      2015-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50733  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:50:05  

Additional Information
 Earth MOID = 1.07297 au 
 Jupiter MOID = 2.63617 au 
 T_jup = 3.660 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a MPO299122  

22311 (1991 EF2)          Discovered 1991-Mar-10 by Debehogne, H. at La Silla
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 EF2 = 1998 KN47 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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