## Solar system bodies

The PLANET name command is similar to the SOURCE command, but the object must be a Solar System body. No catalog is used. Known objects are: SUN, MOON, MERCURY, VENUS, MARS, JUPITER, SATURN, URANUS, NEPTUNE. PLANET with no argument compute positions for all these objects.

Just like SOURCE, the PLANET command updated a number of ASTRO global variables (RA), DEC, AZIMUTH, ELEVATION). A structure called astro%planet% is also created, and contains all output values of the PLANET command.

In addition to the position, information is given on the planet's apparent size and position angle, its brightness temperature and flux at (sub)millimeter wavelengths, at the current frequency.

- The observing frequency (in GHz) is updated by modifying the value of the variable FREQUENCY. Default is 100 GHz.
- The beam of the telescope is computed by ASTRO, using the antenna diameter associated to the selected observatory (Table ). This can however be modified by the user, by setting the BEAM variable to a non-zero value. The read-only PRIMBEAM variable contains the value actually used in the computation.