One of the central requirements for an observation is the definition of where to look. This article is a description of the data entry necessary for this particular part of an observation definition: see >>How to create a new project<< and >>How to add an observation to a project<< for the first part of this task.
Each target is identified by a name, coordinates on the sky (Right Ascension, R.A., and Declination) for equinox 2000, proper motions, V-magnitude (brightness), and colour (expressed as a B-V magnitude).
This information can be entered by hand or - if the object is reasonably well-known - by entering the name and pressing the "Query Simbad" button. If the latter, the portal asks a large astronomical database for the other info.
If you entry the information by hand, you have to press the "Accept target button" to indicate that the information should be correct and complete.
Either way, an image of the correct target is then displayed from the Digital Sky Survey, along with a small catalogue of stars known to be in the field. These stars are used by the system to identify and position the final image.
If there are no bright stars in the field, the system will not be able to focus automatically and you will see a big red warning message above the image!
Eventually, this image will be used to identify which stars should be measured automatically.
Below the image should appear charts showing the yearly and nightly visibility of the object, i.e. when the object is likely to be picked by the robotic scheduling software.
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