def parallaxMinError(G, vmini, extension=<NUM_LIT:0.0>):
return _astrometricErrorFactors["<STR_LIT>"].min()*parallaxErrorSkyAvg(G, vmini, extension=extension)<EOL>
Calculate the minimum parallax error from G and (V-I). This correspond to the sky regions with the
smallest astrometric errors.  At the bright end the parallax error is at least 14 muas due to the
gating scheme.

Parameters
----------

G     - Value(s) of G-band magnitude.
vmini - Value(s) of (V-I) colour.

Keywords
--------

extension - Add this amount of years to the mission lifetime and scale the errors accordingly.

Returns
-------

The minimum parallax error in micro-arcseconds.