Meade LNT Instruction Manual Page 25

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Event Menu
The Event menu provides access to dates and times of astronomical events. The Event
database includes:
Sunrise and Sunset calculates the time that the Sun rises or sets on the current date. Find
rise and set times for other dates by entering a new date into the “Setup: Date” menu. See
"DATE," page 27.
Moonrise and Moonset calculates the time that the Moon rises or sets on the current date.
Find r
ise and set times for other dates by entering a new date into the “Setup: Date” menu. See
"DATE," page 27.
Moon Phases displa
ys 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.
NOTE: Meteors are fast moving objects that cover large areas of the sky and are
usually best observed with the naked eye.
Solar Eclipse lists upcoming Solar Eclipses, including the date and type (total, annular, or par-
tial) of eclipse, and the location and time of the first and last contacts of the Moon's shadow.
Use the Scroll Up and Down keys to display the available data. Remember, never use a
telescope to look at the Sun! See “WARNING!” to the left.
Lunar Eclipse lists upcoming Lunar Eclipses, including the date and type (total, partial,
penumbral) of eclipse. Use the Scroll Up and Down keys 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. AutoStar calculates
minimum magnitude time at mid-eclipse.
Autumn and Vernal Equinox calculates the time and date of the fall or spring equinox 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 AutoStar functions. Access directly through the Glossary menu or
through hypertext words embedded in AutoStar. A
hypertext word is any word in [brackets],
usually f
ound when using the A
utoStar 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 and
A
utoStar goes to the glossar
y entr
y f
or that w
ord.
To access directly from the Glossary menu, use the Scroll keys to scroll through the alphabet.
Press ENTER on the desired letter. Scroll to the desired entry and then press ENTER to read
the descr
iption.
Utilities Menu
The Utilities menu provides access to several extra features within AutoStar, including a
countdo
wn timer and an alar
m.
The Utilities functions include:
Timer selects a countdown timer. This feature is useful for functions such as astrophotography
and tracking satellites. See
OBSERVING SATELLITES, page 32. To use the Timer, press
ENTER, then choose
“Set” or “Start/Stop."
J
Set: Enter the time to be counted down, in hours, minutes, and seconds, then press ENTER.
J Star
t/Stop
:
Activ
ates the timer set pre
viously
.
Use the Scroll k
e
ys to toggle betw
een ON and
OFF
.
When ON is displa
y
ed, press ENTER to activ
ate the timer. When the timer runs out, four
beeps sound and the timer is deactiv
ated.
Alarm selects a time f
or an alarm signal as a reminder. To use the Alarm, press ENTER, then
choose "Set" or "Start/Stop."
Use the Event men
u
to look up dates of
various astronomical
events, such as
sunrises and sunsets,
eclipses, moon
phases, meteor
showers, equinoxes
and solstices...
...and not just for the
current date. Set any
date, past or future,
when initializing
AutoStar and you can
check the time for
other events.
Use the Glossary
menu to look up
definitions of
astronomical terms and
get a description of
AutoStar features.
Use the Utilities
men
u
to perf
or
m
man
y of AutoStar’s
useful features, such
as setting an alar
m,
adjust the displa
y
contrast, calculate the
best e
y
epiece f
or
vie
wing an object, set
up your own landmark
sur
v
e
y
, and so forth.
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