WMMOONCLOCK(1)WMMOONCLOCK(1)NAMEWMMOONCLOCK - 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. Click
ing 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 tempo
ral) 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 mea
sured 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 cor
rectly.
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 lat
itude 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 neces
sary.
-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 numbers 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)
