画像:Crater constellation map.png
出典: フリー百科事典『ウィキペディア（Wikipedia）』
| このファイルはウィキメディア・コモンズから呼び出されたものです。 ページ・ノートへの記入や履歴などの詳細の確認はコモンズの画像説明ページ（ノート/履歴/ログ）を使用してください。 |
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ウィキメディア・コモンズの記述
en: This is a celestial map of the constellation Crater, the Cup.
Copyright © 2003 Torsten Bronger.
It was created by Torsten Bronger using the program PP3 on 2003/08/18. At PP3's homepage, you also get the input scripts necessary for re-compiling the map.
The yellow dashed lines are constellation boundaries, the red dashed line is the ecliptic, and the shades of blue show Milky Way areas of different brightness. The map contains all Messier objects, except for colliding ones. The underlying database contains all stars brighter than 6.5. All coordinates refer to equinox 2000.0.
The map is calculated with the equidistant azimuthal projection (the zenith being in the center of the image). The north pole is to the top. The (horizontal) lines of equal declination are drawn for 0°, ±10°, ±20° etc. The lines of equal rectascension are drawn for all 24 hours. Towards the rim there is a very slight magnification (and distortion).
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".
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