User manual MEADE ETX AT MODELS

[. . . ] Instruction Manual ETX-90AT Astro Telescope ETX-105AT Astro Telescope ETX-125AT Astro Telescope CONTENTS WARNING! Never use a Meade ETX Astro Telescope to look at the Sun!Looking at or near the Sun will cause instant and irreversible damage to your eye. Eye damage is often painless, so there is no warning to the observer that damage has occurred until it is too late. Do not point the telescope or its viewfinder at or near the Sun. [. . . ] Calculations are for standard time. 31 Using Autostar to Find Objects Not in the Database In this procedure, you will enter coordinates of celestial objects that do not appear in any of the Autostar database lists. You will enter the object's name and R. A. You may also enter the object's magnitude and size (optional information). Although Autostar contains an extensive database of celestial objects (stars, nebulae, planets, etc. ) that you can observe, you may eventually want to view objects that are not part of the database. Autostar provides a feature that allows you to enter an object's R. A and Dec coordinates in the "User: Objects" option of the Object menu and allows automatic slewing of the telescope to the user-entered coordinates. In order to use this menu option, you first need to look up the R. A and Dec. coordinates of the object or objects you wish to observe. Check out your local library, computer store or bookstore for astronomy books, CD Roms or magazines (such as Sky & Telescope or Astronomy), to find coordinates of celestial objects. The objects/coordinates you enter become part of your own permanent database, called "User Objects. " To enter coordinates of an object into the "User: Objects" option of the Object menu: 1. Make sure Autostar has been initialized and the telescope has been aligned. After the telescope is aligned, "Select Item: Object" displays. (If necessary, use the Scroll keys to scroll through the menus, as previously described, to find this option. ) Press ENTER. "Object: Solar System" displays. Keep pressing the Scroll Up key until "Object: User Object" displays and press ENTER. "User Object: Select" displays. "Name" displays on the top line and a blinking cursor on the second line. Use the Arrow keys, as previously described, to enter the name of the object you wish to add to the database. "Right Asc. : 00. 00. 0" displays. Use the Number keys to enter the digits for the Right Ascension coordinate of your object. "Declination: +00°. 00'" displays. Use the Number keys to enter the digits for the Declination coordinate of your object. If necessary, use the Scroll Keys to change "+" to "-. " When you are finished, press ENTER. [. . . ] 55: Saturn has the most extensive ring structure in our Solar System. Open Clusters are loose groupings of young stars, all recently formed from the same diffuse nebula. 56) is an open cluster 410 light years from Earth. Several hundred stars of the cluster are visible through your telescope. Constellations are large, imaginary patterns of stars believed by ancient civilizations to be the celestial equivalent of objects, animals, people or gods. [. . . ]