Ruby and Perl programming languages (for preprocessing my own pp3 input format, and various database and data manipulation tasks).PP3 celestial charting program and its data/catalogs.The following software and data are being used in this project: Your results may vary depending on platform and PDF viewer. These PDF’s display and print as expected on Acroreader-5.05 on my Linux box. These are pretty rare occurrences and I’m not sure any reconciliation is worth the effort at the moment. This means either a star could be plotted but not marked as a double (if the WDS listed it as fainter than the cutoff), or a marker might be plotted without its star - the latter being the only case you can readily notice. Also, since the magnitudes may be slightly different in each source, stars close to the Mag-7.25 cutoff may be mismarked. I selectively marked double stars using the Washington Double Star catalog with the following criteria: only stars with a separation of at least 0.5 arc-seconds, a secondary component of Magnitude 11 or brighter, and were based on at least five observations, were marked as doubles on the charts.īecause separate, non-synchronized data sources were used, occassionally the star positions are not identical, resulting in the double-star marker (the thin horizontal bar) and the star being slightly offset. The Cloudy Nights page allows you to download individual pages, if you wish. Click that link or the image below to download a zip file: Mag7 Star Atlas by Andrew L. SPAC is hosting the zip file of all of the charts. This is the color version of the maps without the Milky Way. The main hosting page is on Cloudy Nights allows you to download individual pages. This is a B&W version of the maps with each page a separate PDF file. For convenience, SPAC is hosting the PDF or you can download the PDF at the Internet Archive. The author also supplied an object index table. The original Star Atlas is hosted at the Internet Archive. Click the map image to download the PDF file hosted by SPAC. The almanac is a single file with all of the pages, including the Milky Way. Taki includes more detail, but the atlas includes 150 pages instead of 21 with the Mag 7 atlas! Almanac Note: If you want more detailed star maps, take a look at Taki’s 8.5 Magnitude Star Atlas, which can be found at. I’ve preserved the author’s credits section at the bottom since this is an impressive work and it took many pieces! I’ve also taken the liberty of downloading the almanac version with Milky Way imprint from the Internet Archive, which has the same Creative Commons License. I’ve converted the tar.gz compressed files to zip files for easier access and you’ll get a link from this site. If you want to download each file one-by-one, you’ll get a link to Cloudy Nights. You can also create and distribute derivative works. This project has a Creative Commons License that allows you to freely download, use, and/or distribute the work for non-commercial purposes. It is now hosted on Cloudy Nights, one of the most popular astronomy communities on the web. Andrew L Johnson started the Free Mag 7 Star Atlas Project on his personal web site, but it proved too popular, and it needed a more robust server.
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