Meade Instruments Corporation - Meade LX200 Instruction Manuals
stars that are not too close
[ toc ] c. Unknown SITE
To use the LX200 telescope at an unknown location, use the following procedure:
(1)Select site #5 (UNKNOWN) from the SITE menu. (Note: This site cannot be edited like site numbers
(2)Follow the Keypad display prompts to select and center the two alignment stars.
As described above, the LX200 will check the accuracy of the two stars and give the "Align Mismatch - Check Stars" message if it detects an error.
[ toc ] d. Which Alignment Method To Use?
Each of the three methods described above have advantages and disadvantages. The following table summarizes these properties.
|
| Atmospheric | Atmospheric |
| |
| Pointing Accuracy | Refraction |
| ||
| Refracting | When Best Used | |||
| Determined By: | Correction* | Correction |
| |
|
| Determined By: |
| ||
|
|
|
| ||
|
|
|
| Best used when the | |
Level of |
|
| telescope is | ||
Yes | Level of Telescope | permanently | |||
SITE | Telescope | ||||
|
| mounted and | |||
|
|
|
| ||
|
|
|
| accurately leveled. | |
|
|
|
| Best used on a | |
|
|
| transportable | ||
Yes | Level of Telescope | telescope with the | |||
SITE | |||||
|
|
| SITE information | ||
|
|
|
| ||
|
|
|
| available. | |
|
|
| Best used when the | ||
Unknown | No | N/A | SITE information is | ||
SITE |
|
|
| not available. |
*Atmospheric Refraction Correction: Light from a astronomical object is "bent", or refracted, as it passes through the atmosphere. This bending is more pronounced near the horizon because there is more atmosphere for the light to pass through, and it shifts the apparent position of the star. The LX200 calculates this bending and compensates for it when slewing to objects near the horizon.
http://www.meade.com/manuals/lx200/g.html (3 of 16) [7/29/2002 7:28:04 AM]