Moving Blue Star

This object is clearly moving between DeCaLS and SDSS images, not very much but clearly above the error of the imaging. Does anybody know which is this star and how far away. With such motion it should be relatively close or very fast moving star in out backyard? :slight_smile:


SDSS took a spectrum of it (but mis-classified it as a QSO, but with warnings). Not sure what kind of star it is. There is a Gaia measurement for it, but no parallax or proper motion in DR1 – will have to wait until next month (DR2) to find out how close!


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aha, twitter comes through again – it’s a white dwarf star

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Great, found it purely by chance :slight_smile: I will be very interested to see what DR2 will tell abou the distance!