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Sunrise and Sunset calculates the time that the Sun rises or sets on the current date
and location. Find rise and set times for other dates by entering a new date into the
"Setup: Date" menu.
Moonrise and Moonset calculates the time that the Moon rises or sets on the current
date and location. Find rise and set times for other dates by entering a new date into
the "Setup: Date" menu.
Moon Phases displays the date and time of the next Full, New, 1st Quarter, and 3rd
Quarter Moon.
Meteor Showers provides information
on upcoming meteor showers, such as the
Perseids, the Leonids, etc. Also lists the dates of the showers and when they reach
maximum.
Solar Eclipse lists upcoming Solar Eclipses, including the date and type (total, annu-
lar, or partial) of eclipse, and the location and time of the first and last contacts of the
Moon's shadow. Use UP/DOWN to display the available data. Remember, never use
a telescope to look at the Sun! See WARNING! page 3.
Lunar Eclipse lists upcoming Lunar Eclipses, including the date and type (total, par-
tial, penumbral) of eclipse. Use UP/DOWN to display the available data.
Min. (Minimum) of Algol is the minimum brightness of the dramatic eclipsing binary
star system, Algol. It is relatively close at a distance of 100 light years. Every 2.8 days
during a 10-hour period, Algol undergoes a major change in apparent magnitude as
one of the two stars passes behind the other. The combined magnitude of the two stars
thus dips from +2.1 to a minimum of +3.4 halfway through the eclipse as the second
star is hidden. The computer control panel calculates minimum magnitude time at mid-
eclipse.
Autumn and Vernal Equinox calculates the time and date of the fall or spring equi-
nox of the current year.
Winter and Summer Solstice calculates the time and date of the winter or summer
solstice of the current year.
Glossary Menu
The Glossary menu provides an alphabetical listing of definitions and descriptions for
common astronomical terms and the computer control panel functions. Access direct-
ly through the Glossary menu or through hypertext words embedded in the Glossary
text. A
hypertext word is any word in [brackets], usually found when using the Help
function or when reading a scrolling message such as a description of a planet or star.
Press ENTER whenever a hypertext word is on screen to link directly to the Glossary
entry for that word.
To access directly from the Glossary menu, use UP/DOWN to scroll through the alpha-
bet. Press ENTER on the desired letter. Scroll to the desired entry, then press ENTER
to read the description.
Utilities
Menu
The Utilities menu provides access to several extra features, including a countdown
timer and an alarm. The Utilities functions include:
Timer selects a countdown timer. This feature is useful for functions such as
astrophotography. To use the Timer, press ENTER, then choose "Set" or "Start/Stop".
•
Set: Enter the time to be counted down, in hours, minutes, and seconds, then press
ENTER.
• Start/Stop: Activates the timer set previously. Use UP/DOWN to toggle between
ON and OFF. When ON is displayed, press ENTER to activate the timer. When
the timer runs out, the display flashes and the timer is deactivated.
Alarm selects a time for an alarm signal as a reminder. To use the Alarm, press
ENTER, then choose "Set" or "Start/Stop."
•
Set: Enter the time of day for the alarm to flash, in hours, minutes, and seconds, then
press ENTER.
• Start/Stop: Activates the alarm set previously. Use UP/DOWN to toggle between
ON and OFF. When ON is displayed, press ENTER to activate the alarm. When
the alarm time arrives, the display flashes. Press ENTER to deactivate the alarm.
NOTE: Meteors are
fast moving objects
that cover large
areas of the sky
and are usually
best observed with
the naked eye.
NOTE: The equi-
nox and the sol-
stice are the days
of the year when
the seasons
change.These
days are deter-
mined by the loca-
tion of the Sun in
the sky. Vernal
means spring.