How do you Plan Observations?

C2A lets you plan observations, which is to say to find objects (deep sky, asteroids, comets and planets) which meet certain criteria. These criteria can be of different types:

-        Magnitude of object

-        Type of object

-        Size of object

-        Position in the current map

-        Position in azimuth and elevation at the current map time

Once the objects are identified, you can centre the current map on one of the objects in the list, or point the telescope at it. You can also save the list of objects in a text file for future use, or print the list.

The observation planning window can be displayed by using the command Observations Planner… in the Telescope menu. SHIFT+F8 is a shortcut for this command.

The Planning of observations section describes precisely all the components of this window.


Suppose you want to find all the galaxies with a visual magnitude less than 11 in the region of the constellation Leo. In addition, you want the size of galaxies to be greater than 5 arc minutes. The steps in this process are as follows:

The result obtained on the map is as follows (in this case, 15 objects were found in the selection process):

The current map can be centred on one of these objects by double-clicking it in the list.

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