P. Clay Sherrod Oct 8 2:12 PM
----- Original Message -----
From: "Bill J Gray" <pluto@...>
To: <guide-user@yahoogroups.com>
Sent: Thursday, October 08, 2009 3:50 PM
Subject: Re: [guide-user] UCAC-3 naming
> Hi Bertrand,
>
> I think some files must have been missing in that update
> for you to see this misbehavior. As it happens, I've just
> posted yet another update, with a few changes unrelated to
> UCAC-3. (You can 'sync' ASCOM scopes, and I swapped in SDSS7
> in place of SDSS6.) But I'm pretty sure that all files are
> now present, so the problem should go away.
>
> What happened was that for a while, the "official" way to
> number UCAC-3 stars was by their MPOS number. This number,
> running up to a bit past 140 million, is apparently intended
> for USNO's internal use; it's not really relevant for the rest
> of us, best as I can tell. So USNO shifted to a new numbering
> scheme, '3UC' plus a three-digit zone number (from 1 to 360),
> a '-', plus a six-digit number. So, for example, '3UC314-159265'
> would be a valid identifier. ('3U' was already taken, by a
> radio catalog.)
>
> When you entered '3UC137-322711', Guide found the right star
> with that identifier, but when you clicked on it, you got the
> old MPOS number. This is now fixed.
>
> More about all this at
>
> http://www.projectpluto.com/new.htm#ucac3_modified
>
> -- Bill
>
>
>
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