C2A 2.1.9 freeware

C2A (Computer Aided Astronomy) is a Planetarium software that allows you to build detailed views of stellar fields. An important objective of this software is to take into account the main catalogues available to professional and amateur astronomers in order to prepare observations on small fields as well as astrometry and photometry works.

Author Philippe Deverchère
Released 2021-06-29
Filesize 41.00 MB
Downloads 1535
OS Windows XP, Windows Vista, Windows Vista x64, Windows 7, Windows 7 x64, Windows 8, Windows 8 x64, Windows 10, Windows 10 x64
Installation Instal And Uninstall
Keywords planetarium software, solar system simulator, star system simulator, planetarium, solar system, star system
Users' rating
(8 rating)
C2A - Freeware Download Notice

C2A Free Download - we do not host any C2A torrent files or links of C2A on rapidshare.com, depositfiles.com, megaupload.com etc. All C2A download links are direct C2A download from publisher site or their selected mirrors.

C2A freeware - The Latest User Reviews
C2A freeware - The Latest Versions History
2.1.9 Jun 29, 2021 New Release Few minor bug fixes.
It is now possible to import comet orbital elements where perihelion distance is greater than or equal to 10 AU.
2.1.8 May 4, 2021 New Release New features:
Orbital elements from JPL are now taken into account in the automatic importation process.
Since January 1st, 2021, Mars, Jupiter, Saturn and Uranus satellites are not displayed anymore in previous versions of C2A (IMCCE polynomial coefficient files have not been updated). This is partially solved in this version where Jupiter and Saturn satellites are displayed if the Pyhton environment is installed on your computer. For now, Mars and Uranus satellites are not displayed.
It is now possible to change the constellation names by editing the files constellations_fr.txt (for French version) and constellations_en.txt (for English version). These files are located into the C2A installation folder.
3000 orbital elements can now be displayed in the Asteroid and Comet tool.
The Moon terminator (display, phase tool, planet visibility tool and main window icon) is reverted if the current location is in the South hemisphere.
2.1.7 Apr 14, 2020 New Release Change of behaviour of the Julian Day display zone in the main window: a left click on this zone triggers the display of a dialog box to enter a UT date expressed in Julian days that will become the current date of the map. A right click on this zone copies the current Julian day into the Windows clipboard.
A bug has been fixed regarding the background image management system.
A bug has been fixed in the interface to enter geographical coordinates under the for of a decimal number. E, W, S, N symbols were not correctly interpreted.
Planetary magnitude accuracy has been improved.
A bug has been fixed in tne calculation of comet magnitudes (there was an issue with the very specific comet 1I/`Oumuamua).

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