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Geoff, thanks for the link to Simbad. I've had a very quick look and it appears to be a very powerful tool. Using the Basic Search tool, I entered the star that you suggested and Simbad came up with two stars, but I could not see any reference to the SAO x-reference. I might have to read the help I think. My own Meade controller seems to have a large SAO listing, but none of the others like HR.
Rob, thanks too for the link to the Southern doubles catalogue. I'll have a closer look at that too. There seems to be no shortage of reference material out there!
Cheers
Chris
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