Summary: This small investigation shall give a concise insight into the theory of astrometric measuring precision.

Bibtex entry for this abstract:

@UNPUBLISHED{LL:2004BASNOCODE,
author = {U.~Bastian},
title={{T}he maximum reachable astrometric precision - {T}he {C}ramer-{R}ao {L}imit},
institution={},
year={2004},
month={April},
url={http://www.rssd.esa.int/doc_fetch.php?id=2939027},
note={2004BASNOCODE},
type={Technical note}
}