Star Catalogues

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Revision as of 21:33, 7 June 2007 by Johannes (Talk | contribs)
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In Stellarium version 0.9.0, star catalogues are split into 9 files, which contain stars of varying brightness. These files can be found in the <installation directory>/stars/default/. Only the smaller four of these files come with Stellarium in the main package to keep the size manageable.

About 99% of all these stars come from the NOMAD catalog (Naval Observatory Merged Astrometric Dataset version 1, by USNO). The rest (brighter ones) from Tycho2 and Hipparcos. Please see the stellarium README file for the conditions, under which you may redistribute data files originating from NOMAD.

Here is a list of all available catalogues. The RAM needed column is an estimate. (MNG managed to load file 7 with 512 M ram, but only just. YMMV).

File name Star Count Magnitude Range File Size RAM needed Availability
stars_0_0v0_0.cat 5,013 m < 6.0 138K 256M In default package
stars_1_0v0_0.cat 21,999 6.0 <= m < 7.5 602K 256M In default package
stars_2_0v0_0.cat 151,516 7.5 <= m < 9.0 4.1M 256M In default package
stars_3_0v0_0.cat 434,064 9.0 <= m < 10.5 4.2M 256M In default package
stars_4_1v0_0.cat 1,725,497 10.5 <= m < 12.0 17M 512M Separate download
stars_5_1v0_0.cat 7,669,011 12.0 <= m < 13.5 44M 512M Separate download
stars_6_2v0_0.cat 26,615,233 13.5 <= m < 15.0 153M 512M Separate download
stars_7_2v0_0.cat 57,826,266 15.0 <= m < 16.5 333M 512M (just!) Separate download
stars_8_2v0_0.cat 116,923,084 16.5 <= m < 18.0 674M 1024M? Separate download

To try out the large catalogue files download them from here, and put then in the stars/default sub-directory of the Installation Data Directory.

NOTE: when downloading from this page, do not right-click and save as - left click. These are not direct download links - they are links to the list of download mirrors. Left click on them, and wait for your download to start.

For using stars_7_2v0_0.cat i recomment 1GB or RAM, and for stars_8_2v0_0.cat at lease 1.5GB. In version 0.9.0 the catalogs are just loaded into RAM, and if you do not have enough of it, swapping will start. Add up the star catalog sizes, compare with your amount of RAM, and your common sense will tell you how many files you can load. Yours, Johannes

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