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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08729915146714427 5.194e-08  
a 2.559079833951436 1.6008e-08 au
q 2.335674335910796 1.3221e-07 au
i 3.667245666833878 5.038e-06 deg
node 47.18607340188078 9.0456e-05 deg
peri 52.16629705147511 9.5736e-05 deg
M 276.4298648968881 3.4604e-05 deg
tp 2457747.614521025010
(2016-Dec-25.11452103)
0.00014512 JED
period 1495.285695240553
4.09
1.403e-05
3.841e-08
d
yr
n .2407566668669864 2.259e-09 deg/d
Q 2.782485331992077 1.7405e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1108  
   data-arc span      23842 days (65.28 yr)  
   first obs. used      1950-08-14  
   last obs. used      2015-11-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50757  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:34:14  

Additional Information
 Earth MOID = 1.35435 au 
 Jupiter MOID = 2.33755 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
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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