[vsnet-chat 133] Re: variables positions, etc

[Fraser Farrell <fraserf@dove.net.au>]

G'day all,

On 1997-02-19 bas@lowell.edu said:
   >given in publication.  Clearly they have not been so picky about
   >positions, and thousands of them in the GCVS4 are in error by
   >several arcminutes, even in the absence of gross errors caused by
   >typos.  In the Milky Way, this means such variables are in effect
   >lost without first recovering them by reference to the source

There are also the problems caused by large proper motion.  For example,
here's a partial list of multiple identities for some nearby stars:

Proxima Cen = V645 Cen = GSC 9010.04906
Barnard's star = NSV 9910 = GSC 425.00184
Wolf 359 = CN Leo = GSC 261.00377
Lacaille 9352 = NSV 14420 = GSC 7512.01262 = GSC 7512.01230 = GSC
7512.00762 (!)

I suspect that in some dense starfields even the discoverer's finder
chart may not be enough to identify some stars.... :(


cheers,

Fraser Farrell
Variable Stars Group
Astronomical Society of South Australia

WWW: http://vsnet.gist.net.au/assa/   email: fraserf@dove.net.au
traditional:  GPO Box 199, Adelaide, SA 5001, Australia

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