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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1796262060636542 5.4306e-08  
a 2.761526118941184 2.2824e-08 au
q 2.265483659250092 1.5043e-07 au
i 19.09292260356647 6.2586e-06 deg
node 120.8251449392773 1.71e-05 deg
peri 215.507291533066 2.4053e-05 deg
M 283.2866469866128 2.0656e-05 deg
tp 2457957.682871489522
(2017-Jul-23.18287149)
9.8356e-05 JED
period 1676.185809708887
4.59
2.078e-05
5.689e-08
d
yr
n .2147733251974752 2.6626e-09 deg/d
Q 3.257568578632276 2.6924e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1130  
   data-arc span      9230 days (25.27 yr)  
   first obs. used      1991-01-07  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46918  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:12:55  

Additional Information
 Earth MOID = 1.2757 au 
 Jupiter MOID = 2.11997 au 
 T_jup = 3.239 
[ 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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