MOONCLOCK  shareware by sofTouch APpLications
============================================

           sofTouch APpLications
           646 North Bend Road
           Baltimore, Maryland 21229 USA
           Telephone: 1-410-788-4963

MOONCLOCK produces a continually updating, real-time graphical
representation on the visual aspect of the moon.  The lunar aspect
may be computed geocentrically, or topocentrically, for the
current epoch, or for any time and date.

MOONCLOCK may be run an any Macintosh computer.
To start MOONCLOCK either double click the MOONCLOCK icon, or drag
and drop the MOONCLOCK icon on the APL Runtime STA icon.

The dynamic MOONCLOCK graphic depicts how the moon would appear
to the observer.  The light and dark shaded portions of the lunar
graphic represent the regions of lunar day and night.  The direction
from the Moon's center to celestial north is also indicated.  To the
tight of the lunar graphic the following information is presented:

  * The lunar elongation angle (measured eastward from the sun)
  * The position angle of the bright limb (measured eastward from
     celestial North to the mid-point of the bright limb)
  * The percentage of the lunar surface illuminated by sunlight
  * The current (or selected) Universal Time and Date
  * The geographic longitude at which the sidereal time is 0 hours
  * The observer's sidereal time

An instantaneous lunar ephemeris is presented in the bottom of the
MOONCLOCK window.  The header for the ephemeris indicates
whether positional computations were performed geocentrically or
topocentrically, and the epoch of the ephemeris as both Julian and
Gregorian dates.

The lunar Right Ascension, Declination, Heliocentric Latitude,
Heliocentric Longitude, apparent angular Equatorial Radius, and
Distance from the Earth is displayed.  The equatorial coordinates
of the moon are precessed to the equator and equinox of 2000.0. A.D.
The lunar distance is expressed in Earth radii.  The lunar angular 
radius is expressed in seconds of arc.

Please see the HELP item in the MOONCLOCK menu for more
information.

Try MOONCLOCK, and when you decide that this is a really essential
piece of software which you must keep, send $5.00 to sofTouch
APpLications.  We at sofTouch APpLications appreciate the honesty,
integrity and good faith of our shareware users.  Comments and
suggestions regarding our shareware products are always welcome.
Please distribute MOONCLOCK to anyone who may be interested in
this product.  sofTouch APpLications is pleased to serve and
support all of our users.

MOONCLOCK provides a high precision lunar ephemeris, with an
accumulated error of less than 15-arc seconds per century from 
1990.0.  MOONCLOCK was developed using kernel software supplied
with HIPPARCHUS, a fully integrated Macintosh application for
positional and observational astronomy, from sofTouch
APpLications.

This software was developed using APL.68000, a proprietary product
of MicroAPL Ltd., which has given permission fro a runtime version
of APL.68000 to be included with the software.  Copyright and all
intellectual property rights in APL.68000 remain vested in MicroAPL
Ltd.  APL.68000 is a registered trademark of MicroAPL Ltd.
