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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1852273152797035 4.6928e-08  
a 3.092690763023506 2.6652e-08 au
q 2.519839955998325 1.4572e-07 au
i 16.84502060104219 6.017e-06 deg
node 164.8827598271482 1.8872e-05 deg
peri 212.9035052282285 2.5948e-05 deg
M 51.95338992986356 1.6572e-05 deg
tp 2457113.808668116875
(2015-Apr-01.30866812)
9.1705e-05 JED
period 1986.56679799443
5.44
2.568e-05
7.031e-08
d
yr
n .1812171633812886 2.3425e-09 deg/d
Q 3.665541570048688 3.1589e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1143  
   data-arc span      16155 days (44.23 yr)  
   first obs. used      1971-09-27  
   last obs. used      2015-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51974  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:48:09  

Additional Information
 Earth MOID = 1.53367 au 
 Jupiter MOID = 1.83622 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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