INTERACTIVE KEYSTROKE COMMANDS

The following commands must be terminated by a carriage return.

?	Print help
:	Execute colon command
data	Measure object
q	Exit task


	VALID DATA STRING

x/ra/long y/dec/lat [pmra pmdec [parallax radial velocity]]

... x/ra/long y/dec/lat must be in pixels or the input units
... pmra and pmdec must be in " / year
... parallax must be in "
... radial velocity must be in km / sec

	COLON COMMANDS

The following commands must be terminated by a carriage return.

:show				Show the input and output coordinate systems
:isystem	[string]	Show / set the input coordinate system
:osystem	[string]	Show / set the output coordinate system
:iunits		[string string]	Show / set the input coordinate units
:ounits		[string string]	Show / set the output coordinate units
:oformat	[string string]	Show / set the output coordinate format

	VALID INPUT AND OUTPUT COORDINATE SYSTEMS

image [logical/tv/physical/world]
equinox [epoch]
noefk4 [equinox [epoch]]
fk4 [equinox [epoch]]
fk5 [equinox [epoch]]
icrs [equinox [epoch]]
apparent epoch
ecliptic epoch
galactic [epoch]
supergalactic [epoch]

	VALID INPUT AND OUTPUT CELESTIAL COORDINATE UNITS
	          AND THEIR DEFAULT FORMATS

hours		%12.3h
degrees		%12.2h
radians		%13.7g