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11891 (1991 FJ2)
Classification: Main-belt Asteroid          SPK-ID: 2011891
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09328642433297618 6.9906e-08  
a 2.242258012217592 1.5139e-08 AU
q 2.033085779825846 1.5948e-07 AU
i 2.980225588264157 7.066e-06 deg
node 186.6813866596305 0.00010597 deg
peri 357.2010588972962 0.00011063 deg
M 13.41709459719498 3.3958e-05 deg
tp 2456954.792992886195
(2014-Oct-24.29299289)
0.00011556 JED
period 1226.384925720787
3.36
1.2421e-05
3.401e-08
d
yr
n .2935456824768259 2.973e-09 deg/d
Q 2.451430244609339 1.6552e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      826  
   data-arc span      23475 days (64.27 yr)  
   first obs. used      1949-11-19  
   last obs. used      2014-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50048  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 20:13:18  

Additional Information
 Earth MOID = 1.03609 AU 
 T_jup = 3.626 
[ 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 14.6 mag n/a MPO250330  

11891 (1991 FJ2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla (809)
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 FJ2 = 1999 RR257 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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