# Módulo de coordenas aparentes

El módulo de coordenadas aparentes de la calculadora
Coordenadas aparentes

El módulo de coordenadas aparentes convierte las coordenadas del catálogo de un punto en el cielo a sus coordenadas aparentes para cualquier fecha. Las coordenadas de los objetos en el cielo no son fijas, debido a la precesión, nutación y aberración. Este módulo tiene en cuenta estos efectos.

The module has two tabs to choose the operation mode: interactive and batch. The interactive mode allows to select the input conditions from the GUI, will produce the output for those conditions and will display it on that GUI. The batch mode allows to choose several input conditions from a file, produce the result for each of them and save them on a file.

To use the module in interactive mode, first enter the desired target date and time in the Target Time/Date section. Then, enter the catalog coordinates in the Catalog Coordinates section. You can also specify the catalog's epoch here (usually 2000.0 for modern object catalogs). Finally, press the Compute button, and the object's coordinates for the target date will be displayed in the Apparent Coordinates section.

To use the module in batch mode, select the fields that will appear in the input file, by checking the corresponding checkbox. The fields in the file should appear in the same order they appear in the GUI, separated by spaces. If the input field is an angular quantity or a time field you may use : between the degree or hour, minute and second numbers (&ie; 25:32:27.2). If it is a date you should specify it separating the fields by dashes (&ie; yyyy-mm-dd, where yyyy is for year, mm for month and dd for day of the month). If you want to keep one field constant you may uncheck its checkbox and enter the value in the GUI, so that you do not need to specify it in the file.

The results will be saved in a file preceeded by their initial input conditions. In the next group box you are given the option to include all initial conditions, including those specified in the GUI, or only those conditions that were specified in the input file.

Finally you have to click in the Input File ... and Output File buttons to select the file with the input conditions and the file where you will save the results.