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11889 (1991 AH2)
Classification: Main-belt Asteroid          SPK-ID: 2011889
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1794253172270935 5.9977e-08  
a 2.762232043449951 2.5423e-08 au
q 2.266617682799101 1.6253e-07 au
i 19.09265298421783 7.011e-06 deg
node 120.8349924430092 1.7383e-05 deg
peri 215.42424551 2.4511e-05 deg
M 240.4013671650958 2.0587e-05 deg
tp 2457957.573346359858
(2017-Jul-23.07334636)
9.9475e-05 JED
period 1676.828571831472
4.59
2.315e-05
6.338e-08
d
yr
n .2146909982615572 2.9639e-09 deg/d
Q 3.257846404100801 2.9984e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1060  
   data-arc span      8924 days (24.43 yr)  
   first obs. used      1991-01-07  
   last obs. used      2015-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46222  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:08:09  

Additional Information
 Earth MOID = 1.27536 au 
 Jupiter MOID = 2.11818 au 
 T_jup = 3.238 
[ 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 12.2 mag n/a MPO337359  

11889 (1991 AH2)          Discovered 1991-Jan-07 by McNaught, R. H. at Siding Spring
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 AH2 = 1998 KZ55 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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