Re: Newbie: trying to find 'Hope'
- From: "Richard Bullock" <richard.a.bullock@xxxxxxxxxxxxxxxxxx>
- Date: Thu, 29 Sep 2005 22:28:59 GMT
> Out of interest down to what Mag is the entire sky reliably mapped?
>
The USNO B1 catalogue go to about mag 20 or 21, but I'd imagine that many
are missed at those levels, and the positions are apparently generally known
to a few tenths of an arcsecond.
The future GAIA satellite aims to provide sub-milliarcsecond accuracy in
positions for all stars to mag 20 (and accuracy of a few microarcseconds for
stars brighter than mag 15).
.
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