The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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deuteron mass
 $m_{\rm d}$
 Numerical value  3.343 583 7724 x 10-27 kg
 Standard uncertainty  0.000 000 0010 x 10-27 kg
  Relative standard uncertainty  3.0 x 10-10
 Concise form  3.343 583 7724(10) x 10-27 kg    
 
Click here for correlation coefficient of this constant with other constants
Source: 2018 CODATA     
recommended values 		 Definition of
uncertainty 		      Correlation coefficient with
any other constant

 
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