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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05631476120263695 5.897e-08  
a 2.196480224170093 8.9796e-09 au
q 2.07278596485964 1.2819e-07 au
i 5.427167634561918 5.8589e-06 deg
node 175.7631415427184 4.183e-05 deg
peri 18.68440545387621 5.4186e-05 deg
M 260.5527862458433 3.532e-05 deg
tp 2457928.957733838525
(2017-Jun-24.45773384)
0.00011694 JED
period 1189.020584067663
3.26
7.2914e-06
1.996e-08
d
yr
n .3027701999644387 1.8567e-09 deg/d
Q 2.320174483480546 9.4852e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1339  
   data-arc span      9132 days (25.00 yr)  
   first obs. used      1991-02-09  
   last obs. used      2016-02-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51246  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 16:42:52  

Additional Information
 Earth MOID = 1.07221 au 
 Jupiter MOID = 2.63652 au 
 T_jup = 3.661 
[ 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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