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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 ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1851128445911529 4.2907e-08  
a 3.092948303525249 2.597e-08 au
q 2.520403844886309 1.3117e-07 au
i 16.84502477082746 5.4112e-06 deg
node 164.8823633352256 1.8785e-05 deg
peri 212.9408214594396 2.5869e-05 deg
M 88.17187453172936 1.622e-05 deg
tp 2457113.885560490729
(2015-Apr-01.38556049)
9.0107e-05 JED
period 1986.814946985133
5.44
2.5023e-05
6.851e-08
d
yr
n .1811945297403149 2.2821e-09 deg/d
Q 3.665492762164188 3.0777e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1240  
   data-arc span      16233 days (44.44 yr)  
   first obs. used      1971-09-27  
   last obs. used      2016-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51185  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 16:40:57  

Additional Information
 Earth MOID = 1.53487 au 
 Jupiter MOID = 1.83617 au 
 T_jup = 3.133 
[ 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 12.6 mag n/a MPO358835  

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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