National Geographic BRESSER 70/350 GOTO Mode D'emploi page 12

• Navigation
• Solar System
• Constellation
• Famous Star
• Messier Catal.
• NGC Catalog.
• IC Catalogue
• Sh2 Catalog.
• Bright Star Cat
• SAO Star Catal.
• Customer Objects
• Input RA and DEC
• Custom Land Goal
• Utilities
• Current Objects
• Object Rise/Set
• Curr. Lunar Phase
• Timer
• Alarm
• Eyepiece FOV
• Eyepiece Magn.
• Display Illumin.
• Parkposition
• Setup
• Time and Date
• Daylight Saving
• Site Setting
• Country & City
• Custom Site
• Sky/Land
• Sky Target
• Land Target
• AZ / EQ
• Alt Telescope
• Equ Telescope
• Telescope Mount
• Tracking Rate
• Star Speed
• Solar Speed
• Moon Speed
• Customize Speed
• Language
• Telescope Model
• Reset
Part IV – Observation
After aligning the telescope, the motors in the mount will begin to move the
telescope so that the Earth's rotation is compensated for and the objects
stay in the field of view of the telescope.
Note: If you have aligned the telescope, don't move it manually. Use the
arrow keys on the handbox to make adjustments. If you do move it manually
or change the tripod position, the telescope has to be realigned.
Once you have aligned the telescope, you can slew to every object in the
night sky. This is done by pressing the centre key (5) on the handbox and
selecting the 'Navigation' option from the menu.
Select the object catalogue you prefer from the menu by using the arrow
keys. Press the centre key (5) to confirm your selection.
When you select an object catalogue, the first object of the catalogue will be
displayed. You can change the currently displayed object by pressing the up
and down arrow keys.
Select the object you want to view with the telescope by pressing the centre
key (5). The telescope will then slew to that position.
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Object catalogue of the solar system
Catalogue with the stellar constellations
Famous star catalogue
Catalogue with bright deep-sky objects
Extensive catalogue with broad variety
Catalogue with faint objects
Catalogue with faint objects
Catalogue with bright stars
Extensive star catalogue
Allows you to store your own objects
Insert a custom point in the sky
Insert a custom land target
Currently visible objects
Rising and setting time of an object
The current lunar phase
Timer function
Set up an alarm
Field of view of the eyepiece
Magnification of the eyepiece
Display brightness
Slew to park position
Enter time and date
Enable/disable daylight saving
Set the current location
Set the current location according to a city
Set the current location by using
GPS coordinates
Switch between sky and land targets
Setting for sky observation
Setting for land target observation
Switch between Azimuthal
and equatorial mounting
Alt./AZ mount type
EQ mount type
Configure telescope mount settings
Set the tracking rate
Change the language
Reset to factory settings
Example: Let's observe Jupiter.
Jupiter is visible in different parts of the world at different times depending on
location, time of year and local conditions.
If it is visible from your location and the telescope is aligned, you can navi-
gate to Jupiter by following these steps. Press the centre key (5) on your
handbox and select the 'Navigation' option. Move the selection bar with the
arrow keys, then press the centre key (5) for confirmation.
Next, select the 'Solar System' menu option and scroll with the arrow keys
to find Jupiter. Select Jupiter by pressing the centre key (5).
Once you select Jupiter, your telescope will automatically slew towards
Jupiter. When the telescope reaches Jupiter's position, a loud beeping noise
will let you know that the telescope is done moving. You may then begin your
observation.
Formula for calculating magnification:
Focal length (Telescope) ÷ Focal length (Eyepiece) = Magnification
Examples:
350 mm ÷ 20 mm
350 mm ÷ 10 mm
1250 mm ÷ 25 mm
1250 mm ÷ 12.5 mm
Possible observation targets
The following section details several interesting and easy-to-find celestial
objects you may want to observe through your telescope.
The moon
The moon is Earth's only natural satellite.
Diameter: 3,476 km
Distance: 384,400 km from Earth (average)
The moon has been known to humans since prehistoric times. It is the sec-
ond brightest object in the sky, after the sun. Because the moon circles the
Earth once per month, the angle between the Earth, the moon and the sun
is constantly changing; one sees this change in the phases of the moon.
The time between two consecutive new moon phases is about 29.5 days
(709 hours).
Constellation Orion: The Orion Nebula (M 42)
Right Ascension: 05 h 35 m (hours : minutes)
Declination: -05° 22' (Degrees : minutes)
Distance: 1,344 light years from Earth
Though it is more than 1,344 light years from Earth, the Orion Nebula
(M 42) is the brightest diffuse nebula in the sky. It is visible even with the
= 17.5X
= 35X
= 50X
= 100X