This is done using the operating systems mmap function, hence the name "mmap loading". Since version 0.9.1 you can instruct your computer to load all the stars into main memory not at startup, but to load groups of stars when they are displayed for the first time. 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. In version 0.9.0 the catalogs are just loaded into RAM, and if you do not have enough of it, swapping will start. Left click on them, and wait for your download to start.įor using stars_7_2v0_0.cat I recommend 1GB of RAM, and for stars_8_2v0_0.cat at lease 1.5GB. These are not direct download links - they are links to the list of download mirrors. NOTE: when downloading from this page, do not right-click and save as - left click. To try out the large catalogue files download, and put then in the stars/default sub-directory of the Installation Data Directory. Won't do (the program won't be able to write the downloaded files to their directories). This warning has been here since some undetermined moment. It may be relevant to an older version of Stellarium. Some or all of the information in this section is no longer accurate. For mmap loading system memory is not a limit any more, see next section. (MNG managed to load file 7 with 512 M ram, but only just. The RAM needed column applies for the case of ordinary catalog loading at startup, and is an estimate. Here is a list of all available catalogues. Please see the stellarium README file for the conditions, under which you may redistribute data files originating from NOMAD. The rest (brighter ones) from Tycho2 and Hipparcos. Only the smaller four of these files come with Stellarium in the main package to keep the size manageable.Ībout 99% of all these stars come from the NOMAD catalog (Naval Observatory Merged Astrometric Dataset version 1, by USNO). These files can be found in the /stars/default/. In Stellarium version 0.9.0, star catalogues are split into 9 files, which contain stars of varying brightness.
TODO: Describe the difference in locations - user vs. This page itself should be updated, archived or deleted. It may be relevant to an older version of Stellarium, or it may not be relevant at all.
Some or all of the information on this page is no longer accurate.
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