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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1779205796933475 5.9995e-08  
a 2.76600592086748 2.6589e-08 AU
q 2.273876543991507 1.6222e-07 AU
i 19.1076931781729 7.3111e-06 deg
node 120.8806458181747 1.8732e-05 deg
peri 215.0543236188374 2.6632e-05 deg
M 155.029790413014 2.0818e-05 deg
tp 2456276.913019272344
(2012-Dec-15.41301927)
9.4625e-05 JED
period 1680.266175732952
4.60
2.4228e-05
6.633e-08
d
yr
n .2142517686776405 3.0893e-09 deg/d
Q 3.258135297743454 3.1319e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      885  
   data-arc span      8784 days (24.05 yr)  
   first obs. used      1991-01-07  
   last obs. used      2015-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48597  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:33:29  

Additional Information
 Earth MOID = 1.28476 AU 
 T_jup = 3.237 
[ 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 12.1 mag n/a MPO240301  

11889 (1991 AH2)          Discovered 1991-Jan-07 by McNaught, R. H. at Siding Spring (413)
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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