Manual Bresser 90-62000 National Geographic (page 12 of 32) (English, German, French, Italian, Spanish)

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• Navigation

• Solar System Object catalogue of the solar system

• Constellation Catalogue with the stellar constellations

• Famous Star Famous star catalogue

• Messier Catal. Catalogue with bright deep-sky objects

• NGC Catalog. Extensive catalogue with broad variety

• IC Catalogue Catalogue with faint objects

• Sh2 Catalog. Catalogue with faint objects

• Bright Star Cat Catalogue with bright stars

• SAO Star Catal. Extensive star catalogue

• Customer Objects Allows you to store your own objects

• Input RA and DEC Insert a custom point in the sky

• Custom Land Goal Insert a custom land target

• Utilities

• Current Objects Currently visible objects

• Object Rise/Set Rising and setting time of an object

• Curr. Lunar Phase The current lunar phase

• Timer Timer function

• Alarm Set up an alarm

• Eyepiece FOV Field of view of the eyepiece

• Eyepiece Magn. Magnification of the eyepiece

• Display Illumin. Display brightness

• Parkposition Slew to park position

• Setup

• Time and Date Enter time and date

• Daylight Saving Enable/disable daylight saving

• Site Setting Set the current location

• Country & City Set the current location according to a city

• Custom Site Set the current location by using

GPS coordinates

• Sky/Land Switch between sky and land targets

• Sky Target Setting for sky observation

• Land Target Setting for land target observation

• AZ / EQ Switch between Azimuthal

and equatorial mounting

• Alt Telescope Alt./AZ mount type

• Equ Telescope EQ mount type

• Telescope Mount Configure telescope mount settings

• Tracking Rate Set the tracking rate

• Star Speed

• Solar Speed

• Moon Speed

• Customize Speed

• Language Change the language

• Telescope Model

• Reset Reset to factory settings

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.

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.

350 mm ÷ 20 mm = 17.5X

350 mm ÷ 10 mm = 35X

1250 mm ÷ 25 mm = 50X

1250 mm ÷ 12.5 mm = 100X

Formula for calculating magnification:

Focal length (Telescope) ÷ Focal length (Eyepiece) = Magnification

Examples:

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

(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

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Bresser 90-62000 National Geographic Manual

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