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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1855346448056587 8.2999e-08  
a 3.093773023553022 3.3687e-08 AU
q 2.519770944518783 2.7023e-07 AU
i 16.84441512291607 8.0978e-06 deg
node 164.8812385719339 1.9828e-05 deg
peri 212.9151507492761 2.7572e-05 deg
M 339.4677413175465 2.137e-05 deg
tp 2457113.861432620067
(2015-Apr-01.36143262)
0.00011859 JED
period 1987.609662160542
5.44
3.2463e-05
8.888e-08
d
yr
n .1811220818924165 2.9582e-09 deg/d
Q 3.667775102587261 3.9937e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      15744 days (43.10 yr)  
   first obs. used      1971-09-27  
   last obs. used      2014-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52166  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:38:55  

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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