Meade LX200R Manuel d'instructions télécharger pdf (Page 34)

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Looking at or near the Sun will cause irreversible damage to your eye. Do not point this tele-

scope at or near the Sun. Do not look through the telescope as it is moving.

Observing Satellites

In this procedure, you will prepare your telescope to observe a satellite pass.

1. Navigate to the "Object: Satellite" menu option and press ENTER.

2. Use the Scroll keys to scroll through the list of satellites.

3. Select a satellite from the list and press ENTER.

4. "Calculating...." and then "Tracking..." displays. If the satellite is going to make a

pass, "Located" displays.

5. Use the Scroll keys to display data about the pass: aos—acquisition of signal and

los—loss of signal. If you subtract the aos from the los, you can calculate how

long the satellite will be visible. Location information also displays.

6. "Alarm" displays after the location information. Press ENTER and AutoStar II

automatically sets the alarm to sound a minute before the satellite's scheduled

appearance. You may return to regular observations until the alarm goes off.

7. When the alarm goes off, return to the Satellite menu and press a Scroll key until

the desired satellite is on the top line of the display.

8. Press GO TO. AutoStar II slews the telescope to where the satellite should

appear. The motor drive stops and a countdown is displayed.

NOTE: If the scheduled appearance position of the satellite is obstructed

(i.e., by a building, tree, or hill), press ENTER and AutoStar II starts to

move the telescope along the expected satellite track. When the track

clears the obstruction, press ENTER again to pause the telescope, then

continue with this procedure.

9. With about 20 seconds left on the countdown timer, start watching through the

telescope viewfinder for the satellite to enter the field of view.

10. When the satellite enters the viewfinder field of view, press ENTER. The tele-

scope starts to track with the satellite.

11. Use the AutoStar II Arrow keys to center the object in the viewfinder, then look

through the eyepiece to view the object.

Satellite orbits change and new satellites (including the Space Shuttle) are launched.

Visit the Meade website (www.meade.com) approximately once a month to get

updated information and instructions on how to download this data to AutoStar II. If

orbital parameters are more than one month old, the satellite pass may not happen at

the time predicted by AutoStar II. Downloading requires the optional

LX200 Interface

Cable. See OPTIONAL ACCESSORIES, page 44.

Note: Satellite observing is an exciting challenge. Most satellites are in

low orbit, travelling at approximately 17,500 mph. When visible, they move

quickly across the sky and are only in the field of view for a few minutes,

requiring AutoStar II to slew the telescope rapidly. Best viewing is near

Sunrise or Sunset when the sky is still dark. Viewing in the middle of the

night can be problematic because a satellite may pass overhead, but not

be visible as it is in the Earth's shadow.

Landmarks

This menu option allows you to define and store terrestrial objects in the Landmark

database. First, a landmark needs to be stored in memory using the "Landmark: Add"

option. To view a landmark, use the "Landmark: Select" option. Landmarks may also

be viewed using the "Landmark Survey" option in the Utilities menu.

To Add a landmark to the database:

In this procedure, you will store the location of terrestrial landmarks in AutoStar II's

memory.

1. Note for future reference where the telescope is located and if you have aligned the

telescope, which alignment method is used.

2. Display the "Setup: Targets" menu option. Chose "Terrestrial" and press ENTER.

"Setup: Targets" displays again. Choosing this option turns off tracking for astro-

nomical objects which is not useful for the viewing of terrestrial objects such as

Tips:

To use the Landmark func-

tion, the telescope must be

located and aligned exactly

as when the landmark(s)

was added to the database.

To add objects to the

Landmark database, the tel-

escope must be located and

aligned exactly as when the

original objects were added

to the database.

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Meade LX200R Manuel d'instructions Page 34

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