PLANET

        [ASTRO\]PLANET [name] [/DRAW [...]]

    Compute the coordinates of a Solar System  object.  Known  objects  are:
    SUN,  MOON,  MERCURY,  VENUS, MARS, JUPITER, SATURN, URANUS, NEPTUNE. By
    default, all known objects are plotted if visible.  The Option /DRAW  is
    used  to  plot  the object symbol on the screen.  The planet coordinates
    (apparent  RA,  apparent  DEC,  Azimuth  and  Elevation   at   time   of
    computation) are typed on the screen.

    PLANET outputs also the geocentric and  heliocentric  distances  of  the
    object  (in A.U.), the apparent minor and major diameters (in arc.sec.),
    the position  angle  of  the  central  meridian  (east  from  north,  in
    degrees), the brightness temperature (in K), and the flux (in Jy) at the
    current frequency. The frequency may be entered either  through  command
    LINE or by updating variable FREQUENCY (in GHz).

    Arguments to /DRAW may be LINE, MARKER, SYMBOL, or FULL:
      LINE   will draw a line from the previously computed position
      MARKER will draw a marker (GreG style defined by GREG\SET MARKER)
              at the computed position
      SYMBOL will draw the planet's symbol at the computed position
      FULL   will combine MARKER and SYMBOL (the symbol will be offset
             one marker size above the computed position).
    If several arguments are given they will be used in sequence.