emamajek on 23-Aug-2019 15:32:08 GMT about
My point is: there is no evidence for HD 20781 splitting into two stars except Gaia DR2, except that Gaia has a 'duplicate' flag which makes the 2nd Gaia DR2 source likely to be dubious. There is no supporting independent evidence for the existence of a close (<1") companion to HD 20781. It is not clear that "A" and "B" identifiers are warranted when "B" is flagged by Gaia DR2 itself as a duplicate entry for "A".
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