check uncertainty in MASS_HYDROGEN

duffee / Astro-Constants

This Perl module provides physical constants usefull for astronomy in MKS and CGS systems

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Closed duffee closed 7 years ago

duffee commented 7 years ago

1.67372e-24 1.67372e-27 1e-5

duffee commented 7 years ago

Is this just MASS_PROTON + MASS_ELECTRON?
- 1.673532836e-27 +/- small (which is higher than the lower bound of the less precise value)
What is 1.008u (from 1.0078u to 1.0082u) from IUPAC 2013
- 1.6738e-27 +/- 0.00033 kg relative uncertainty 0.02% (0.0002)
Do we have atomic mass unit? yes

duffee commented 7 years ago

Hydrogen has a number of forms. I should defined what I've used and warn the user YMMV.