Free software to draw sky charts

For use with Linux, Windows, Mac OS X

You will find on this pages information about the new version 3 of SkyChart / Cartes du Ciel

Look at the News and Documentation for more information about this version.

Download the current stable version or the last beta version and please report any problem here.

Still using Win95/98/Me? Version 3 as some limitation on this systems. The old version 2.76 that run o­nly with Windows is still available here but no more maintained.


This program enables you to draw sky charts, making use of the data in 16 catalogs of stars and nebulae. In addition the position of planets, asteroids and comets are shown.

The purpose of this program is to prepare different sky maps for a particular observation. A large number of parameters help you to choose specifically or automatically which catalogs to use, the colour and the dimension of stars and nebulae, the representation of planets, the display of labels and coordinate grids, the superposition of pictures, the condition of visibility and more. All these features make this celestial atlas more complete than a conventional planetarium.


Cartes du Ciel Version 3 use Lazarus/FreePascal compiler and the following component :

The Libsql component to access the SQLite and MySQL database.

Synapse TCP/IP library, by Lukas Gebauer

EnhEdits by Paul Warren .

XML Parser .

If a JPL ephemeris file DExxx cannot be found, the planets calculation between -3000 and +3000 is based o­n plan404 by Steve Moshier.

Planetary satellites calculation between 1997 and 2020 use posxy by J.-E. Arlot, Ch. Ruatti, D.T. Vu and W.Thuillot, Bureau des Longitudes. The program diffpos.f was rewritten in Pascal.


Deepsky Astronomy Software

Belorussian FAQ translation