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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09330549119341472 5.8766e-08  
a 2.242647285242828 1.3049e-08 au
q 2.033395978719668 1.3042e-07 au
i 2.98030169330815 6.282e-06 deg
node 186.6744085026751 0.0001058 deg
peri 357.3350090802472 0.00011043 deg
M 130.6951711639424 3.2993e-05 deg
tp 2456955.154641656056
(2014-Oct-24.65464166)
0.00011173 JED
period 1226.704304191246
3.36
1.0707e-05
2.931e-08
d
yr
n .2934692564214522 2.5614e-09 deg/d
Q 2.451898591765989 1.4267e-08 au
  Orbit Determination Parameters
   # obs. used (total)      853  
   data-arc span      24001 days (65.71 yr)  
   first obs. used      1949-11-19  
   last obs. used      2015-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49874  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:34:15  

Additional Information
 Earth MOID = 1.03509 au 
 Jupiter MOID = 2.50748 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 14.7 mag n/a MPO344397  
rotation period rot_per 3.6085 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

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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