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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1856584478258219 8.5642e-08  
a 3.094166680975276 4.1341e-08 AU
q 2.519708497671031 2.7417e-07 AU
i 16.84312275667473 8.7006e-06 deg
node 164.8831567994736 2.5487e-05 deg
peri 212.908053840575 3.3365e-05 deg
M 303.2606795921387 2.8047e-05 deg
tp 2457113.825407835838
(2015-Apr-01.32540784)
0.00015848 JED
period 1987.989034942221
5.44
3.9842e-05
1.091e-07
d
yr
n .1810875179250992 3.6292e-09 deg/d
Q 3.66862486427952 4.9016e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      872  
   data-arc span      15590 days (42.68 yr)  
   first obs. used      1971-09-27  
   last obs. used      2014-06-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53186  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:09:56  

Additional Information
 Earth MOID = 1.53396 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 12.4 mag n/a MPO266068  

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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