Importing the Washington Double Stars Catalog

Jasem Mutlaq mutlaqja at ikarustech.com
Mon Dec 5 08:56:53 UTC 2016


Hello folks,

So I'd like to make the WDS as an addon catalog:
http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/WDS

Note that I have problems accessing the website, I can only see the main
page but any links within timeout.

So what would be the best way to go on about this? The stars are "named",
and a lot them are duplicates of either the static named/unnamed stars, or
Tycho-2/USNO stars. So what are the recommended solution?

1. Import them as is "new stars" and ignore duplication. We need metadata
for angular separation and position angle, and magnitudes of 1st and 2nd
components.
2. "Extend" static/tycho/usno stars with the cross-reference information
provided by WDS? We might miss some stars that are not found in either of
those catalogs, highly unlikely, but possible.

In either case, we need to extend the "metadata".

On another note, I was checking  DeepStarComponent::loadStaticStars() and
found that after each record read, it checks if it is 16 or 32 bytes. Can
you mix 16/32 bytes within a single file?? If not, then no need to perform
such a check after each record unnecessarily.

-- 
Best Regards,
Jasem Mutlaq
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