In article ,
(Eric Flesch) writes:
... you can't download the USNO-B today.

I'm surprised it's not at VizieR. What is
http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=I/284 ?

So I detected a need, and have built an all-sky optical catalogue from
USNO-B, USNO-A, APM and SDSS optical data, it is 1.16 billion objects
in a sparse format which is stored at a mere 9Gb. It's been accepted
by PASA and is now on arXiv at
https://arxiv.org/abs/1705.05434

That's still quite a useful catalog.

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