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16554 (1991 UE2)
Classification: Main-belt Asteroid          SPK-ID: 2016554
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08758600915912104 6.2288e-08  
a 2.558692343165509 1.784e-08 AU
q 2.334586692161642 1.5528e-07 AU
i 3.667617742497285 5.6574e-06 deg
node 47.19997888979139 9.6355e-05 deg
peri 52.00272875047195 0.00010178 deg
M 132.15075040132 3.4685e-05 deg
tp 2456251.727090611369
(2012-Nov-20.22709061)
0.00014246 JED
period 1494.946088311685
4.09
1.5635e-05
4.281e-08
d
yr
n .2408113595631836 2.5185e-09 deg/d
Q 2.782797994169376 1.9402e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      989  
   data-arc span      23325 days (63.86 yr)  
   first obs. used      1950-08-14  
   last obs. used      2014-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4944  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:36:46  

Additional Information
 Earth MOID = 1.35306 AU 
 T_jup = 3.428 
[ 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 13.6 mag n/a MPO263495  

16554 (1991 UE2)          Discovered 1991-Oct-29 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 UE2 = 1987 UN9 = 1997 ED 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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