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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09328645235295988 6.2775e-08  
a 2.242258006729109 1.3803e-08 AU
q 2.033085712021331 1.4095e-07 AU
i 2.980227541402818 6.6868e-06 deg
node 186.6813815973309 0.00010585 deg
peri 357.2010620439333 0.00011049 deg
M 13.41710080549837 3.3177e-05 deg
tp 2456954.792971904654
(2014-Oct-24.29297190)
0.00011294 JED
period 1226.384921217965
3.36
1.1325e-05
3.101e-08
d
yr
n .2935456835546148 2.7106e-09 deg/d
Q 2.451430301436887 1.5091e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      843  
   data-arc span      23956 days (65.59 yr)  
   first obs. used      1949-11-19  
   last obs. used      2015-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4999  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:08:11  

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
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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