Meade ETX-70AT instruction manual Appendix B Using Autostar to Enter R.A. and DEC Coordinates

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APPENDIX B: USING AUTOSTAR TO ENTER R.A. AND DEC COORDINATES

Although Autostar's database contains more than 1400 objects (stars, nebulae, planets, etc.) that you can observe, you may eventually want to view objects that are not part of the data- base. Autostar provides a feature that allows you to enter an object's R.A and Dec coordinates in the "User: Objects" option of Autostar's Object menu and then automatically slews the tele- scope 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. A list of the coordinates of 14 common stars are printed at the end of this manual; see "STAR LOCATOR," page 39.

The objects/coordinates you enter become part of your own permanent database, called "User Objects." You may use this menu to view these object as often as you like, but the objects' coor- dinates just need to be entered once.

To enter coordinates of an object into the "User: Objects" option of the Object menu:

1.Make sure Autostar has been initialized (see "INITIALIZING AUTOSTAR," page 12) and the telescope has been aligned and set to the Alt/Az home alignment position (see "EASY TWO-STAR ALIGNMENT," page 14).

2.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.

3."Object: Solar System" displays. Keep pressing the Scroll Up key until "Object: User Object" displays and press ENTER.

4."User Object: Select" displays. Press the Scroll Down key once. "User Object: Add" dis- plays. Press ENTER.

5."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 data- base. When you are finished, press ENTER.

6."Right Asc.: +00.00.0" displays. Use the Arrow keys to enter the digits for the Right Ascension coordinate of your object. If necessary, use the Scroll Keys to change "+" to "-." When you are finished, press ENTER.

7."Declination: +00°.00'" displays. Use the Arrow 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.

8.Autostar then prompts you to enter the Size of the object. This step is optional. Use the Arrow keys to enter this information, if so desired, and press ENTER to go to the next dis- play. If you do not wish to enter this information, simply press ENTER.

9.Autostar then prompts you to enter the Magnitude of the object. This step is also optional. Use the Arrow keys to enter this information, if so desired, and press ENTER to go to the next display. "User Object: Add" displays again.

To GO TO a user-entered object:

1.With "User Object: Add" displayed, press the Scroll Up key once. "User Object: Select" dis- plays. Press ENTER.

2.Use the Scroll keys (if necessary) to scroll to the desired object. Press ENTER.

3.The name of the object and the Right Ascension and Declination coordinates display.

4.Press GO TO and the telescope slews to the object.

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Contents Meade Instruments Corporation Contents QUICK-START Guide If you wish to observe using Autostar’s databases, go toETX-60AT and ETX-70AT Telescope Telescope FeaturesETX Your Personal Window to the Universe Flip mirror control in the up position Computer Control PanelTour the Cosmos with Just the Push of a Button Autostar FeaturesAutostar Features Join an Astronomy Club Attend a Star Party How to Assemble Your Telescope Parts ListingGetting Started Choosing an EyepieceManual Operation of the Telescope without Autostar Manual Operation of the Telescope Using Autostars Arrow KeysInitializing Autostar Moving Through Autostar’s MenusAutostar Navigation Exercise Autostar OperationEasy Two-Star Alignment Procedure Easy Two-Star AlignmentTo Calculate Sunset time Using the Guided Tour Observing ExercisesGo To Saturn Autostar Menus Complete Autostar Menu StructureObject Menu Event Menu Utilities Menu Glossary MenuSurf the Web Setup MenuMenu Daylight Saving, Advanced Features Two-Star Alt/Az Alignment One-Star Alt/Az AlignmentSlew Speeds Photography with the ETX Observing a SatelliteFew tips on photography with the ETX-60AT or ETX-70AT Instrument across the two slots and turn counAstrofinder Software Optional Accessories#882 Standard Field Tripod set in Alt/Az Configuration General Maintenance Maintenance and ServicingStorage and Transport Inspecting the OpticsUnable to see an image through the eyepiece TroubleshootingETX-60AT/ETX-70AT Specifications Meade Customer ServiceETX-60AT/ETX-70AT Specifications contd Autostar SpecificationsAutostar Dimensions Appendix a Equatorial Polar Alignment Polar AlignmentCelestial Coordinates Easy Polar Alignment Autostar Polar AlignmentOne-Star Polar Alignment Two-Star Polar AlignmentTo GO to a user-entered object Appendix B Using Autostar to Enter R.A. and DEC CoordinatesLatitude Chart for Major Cities of the World Appendix C Helpful ChartsCity State Latitude City Country LatitudeFurther Study Appendix D Training the DriveEnter Appendix E Initialization ExampleAutostar Glossary Basic AstronomyObjects in Space MoonDeep-Sky Objects PlanetsSeason Star Name Constellation Dec Star LocatorMeade Instruments Corporation

ETX-70AT specifications

The Meade ETX-70AT is a compact, portable telescope that caters to both amateur astronomers and educational purposes. This telescope is part of the renowned ETX series, known for its innovative features and user-friendly design. With an aperture of 70mm, the ETX-70AT is designed to provide clear, bright images of celestial objects, making it an ideal choice for novice astronomers eager to explore the night sky.

One of the standout features of the ETX-70AT is its Maksutov-Cassegrain optical design. This design combines a Maksutov corrector plate with a compact cassegrain layout, allowing for a shorter tube length while still providing excellent optical performance. As a result, users can easily transport the telescope to various observing locations without compromising on image quality.

The telescope boasts a focal length of 350mm, which offers a wide field of view, allowing observers to comfortably locate and track celestial phenomena. The ETX-70AT comes equipped with a built-in electronic control system known as the Audio Star, featuring a database of over 30,000 celestial objects. This system not only makes it easier for users to locate specific targets but also enhances the overall observing experience by providing informative audio commentary about different astronomical objects.

Another notable characteristic is its lightweight design, weighing in at just around 5 lbs. This portability factor makes it an excellent choice for stargazers who prefer to travel or hike to optimal viewing locations. The telescope is mounted on an adjustable and stable aluminum tripods, providing a solid foundation for viewing.

The Meade ETX-70AT also includes a variety of accessories, including two eyepieces (26mm and 9.7mm), a finder scope to help users aim accurately, and a variety of optional filters to enhance viewing contrast and clarity. Furthermore, the telescope supports direct connection to a computer for astrophotography, enabling enthusiasts to capture their astronomical observations digitally.

In summary, the Meade ETX-70AT is an exceptional entry-level telescope that combines portability, advanced technology, and ease of use. With its powerful optics, automated features, and impressive accessory offerings, it serves as an excellent tool for any individual or educational institution looking to delve into the wonders of astronomy.
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