WMMOONCLOCK(1)						      General Commands Manual						    WMMOONCLOCK(1)

NAME

       WMMOONCLOCK - Dockable Moon Phase Clock

SYNOPSIS

       wmMoonClock [-display <Display>] [-bc <Color>] [-lc <Color>] [-dc <Color>] [-low] [-lat <Latitude>] [-lon <Longitude>] [-h]

DESCRIPTION

       wmMoonClock  displays the current phase of the moon. Clicking on the icon brings up different displays -- there are 5 in all. The different
       "pages" are;

       First Page
	      Shows the Moon phase image.

       Second Page
	      Shows the current Local Time (LT) and Universal Time (UT), the Moon's Age (number of days since last new moon),  the  geometric  (as
	      opposed  to  temporal)  fraction	of the way through the current lunar cyle (e.g. 50 for full moon), the fraction of the Moon's disc
	      that is illuminated (ratio of area illuminated to total area of disc) and whether the Moon is (locally) visible of not (i.e.  is	it
	      above the horizon?).

       Third Page
	      Shows  the  Rise and Set times for yesterday (first line), today (middle line), and tommorrow (last line). If the Moon does not rise
	      or set on a given day a `null time' is shown (--:--). Note that these times should still be good for high latitude  observers.  Also
	      note that there will always be at least one (--:--) showing up per month. This is because once per month the Moon will rise (set) on
	      a given day but will set (rise) in the very early portion of the next day.

       Fourth Page
	      Shows the Moon's horizon coordinates (i.e. the Altitude/Azimuth system). Azimuth is measured in degrees  CCW  from  due  south,  and
	      altitude	is measured in degrees from the horizon up to the Moon. Distance (Dist) is measured in units on Earth radii (1 Re is about
	      6370km). Note that this is a local coordinate system and will not be correct if the observer's latitude and longitude  are  not  set
	      correctly.

       Fifth Page
	      Shows the Moon's ecliptic coordinates. (i.e. the Right Ascention/Declination system).  Useful for astronomers?

       Many of the quantities shown will not be correct unless LT and UT are correct, and the user specifies the proper latitude and longitude.

OPTIONS

       -display <display>
	      Use an alternate X Display.

       -bc    Set background color. (E.g. #7e9e69 or blue)

       -lc    Set color of text labels.

       -dc    Set color of data values.

       -low   Conserve colors. For 8-bit displays, a lower-color pixmap will be used automatically, but you can also force its use on higher-color
	      displays if necessary.

       -lat <Latitude>
	      Observers Latitude in degrees. Positive in northern hemisphere, negative in southern hemisphere.

       -lon <Longitude>
	      Observers Longitude in degrees. Greenwich is 0.0, and longitude increases positively toward the west. (Alternatively, negative  num-
	      bers can also be used to specify longitudes to the east of Greenwich).

       -h     Display list of command-line options.

BUGS

       Who knows? (Let me know if you find any).

AUTHOR

       Michael G. Henderson <mghenderson@lanl.gov>

								 21 December 1998						    WMMOONCLOCK(1)