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Due to the New England winter storm currently affecting the area, phone coverage at the AAVSO may be much reduced until Wednesday. The staff is still available via email, and we suggest using that method to contact us if you need assistance.
reinhold's picture
Joined: 2012-10-15

Hello goup,

does anybody know where I can download the USNO-B1.0 catalog?

Does anybody know, wether NOMAD catalog does include the complete USNO-B1.0?

Thank you for your help,

Reinhold, CZ

HQA's picture
Joined: 2010-05-10

Hi Reinhold,

NOMAD is a merged catalog that contains USNO-B as well as several others, with the intent to pick the catalog with the best values.  As such, it is inhomogenous.

If you want USNO-B by itself, this used to be available through Dave Monet at USNO-Flagstaff (dgm at nofs dot navy dot mil).  It is many tens of GB, so the requestor normally has to send an external hard drive to Dave for him to copy the catalog onto.  However, that was many years ago, and I don't know if that option is still available.


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