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21564 Widmanstatten (1998 QQ101)
Classification: Main-belt Asteroid          SPK-ID: 2021564
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1855346435672927 8.2974e-08  
a 3.093773024699558 3.3575e-08 AU
q 2.519770949283821 2.7011e-07 AU
i 16.84441512599766 8.0976e-06 deg
node 164.8812398063802 1.9676e-05 deg
peri 212.915150249526 2.7445e-05 deg
M 339.467740285484 2.1227e-05 deg
tp 2457113.861438381244
(2015-Apr-01.36143838)
0.00011779 JED
period 1987.609663265439
5.44
3.2356e-05
8.859e-08
d
yr
n .1811220817917321 2.9484e-09 deg/d
Q 3.667775100115296 3.9804e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      985  
   data-arc span      15771 days (43.18 yr)  
   first obs. used      1971-09-27  
   last obs. used      2014-12-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51671  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:50:40  

Additional Information
 Earth MOID = 1.5354 AU 
 T_jup = 3.132 
[ 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 12.5 mag n/a MPO302196  

21564 Widmanstätten           Discovered 1998 Aug. 26 by E. W. Elst at the European Southern Observatory.
Count Alois von Widmanstätten (1754-1849) was an Austrian chemist who discovered typical patterns by acid etching iron meteorites. These unique Widmanstätten patterns can be used to determine if a piece of iron is in fact a meteorite.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070402/MPCPages.arcLast Updated: 2007-07-05

[ show close-approach data ]
Alternate Designations
 1998 QQ101 = 1971 SG3 = 1987 QY9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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