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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1779205797299614 6.0099e-08  
a 2.766005916105383 2.7976e-08 AU
q 2.273876539975411 1.6229e-07 AU
i 19.10769476898683 7.4787e-06 deg
node 120.8806378791122 2.0328e-05 deg
peri 215.0543361601169 2.9052e-05 deg
M 155.0297872917572 2.1523e-05 deg
tp 2456276.913035709163
(2012-Dec-15.41303571)
9.8939e-05 JED
period 1680.266171393705
4.60
2.5492e-05
6.979e-08
d
yr
n .2142517692309406 3.2505e-09 deg/d
Q 3.258135292235356 3.2954e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      835  
   data-arc span      8476 days (23.21 yr)  
   first obs. used      1991-01-07  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48453  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:27:11  

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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