Celestron NexStar HC manual Utility Features, Helpful

Page 22

Goto Alt-Az- Allows you to enter a specific altitude and azimuth position and slew to it.

Helpful

Hint To store a set of coordinates (R.A./Dec) permanently into the NexStar database, save it as a User Defined Object as described above.

Utility Features

Observing

Tip

Scrolling through the MENU options will also provide access to several advanced utility functions within the NexStar such as cord wrap and anti-backlash.

Cord Wrap – Cord wrap safeguards against the telescope slewing more than 360º in azimuth and wrapping the power cord around the base of the telescope. The cord wrap menu has two settings; batteries and power cord. By default, the cord wrap feature is set to "batteries" when the telescope is powered on. If using the NexStar with a AC adapter, change the setting to "power cord", this will activate the cord wrap feature.

Anti-backlash– All mechanical gears have a certain amount of backlash or play between the gears. This play is evident by how long it takes for a star to move in the eyepiece when the hand control arrow buttons are pressed (especially when changing directions). The NexStar's anti-backlash features allows the user to compensate for backlash by inputting a value which quickly rewinds the motors just enough to eliminate the play between gears. The amount of compensation needed depends on the slewing rate selected; the slower the slewing rate the longer it will take for the star to appear to move in the eyepiece. Therefore, the anti-backlash compensation will have to be set higher. You will need to experiment with different values; a value between 20 and 50 is usually best for most visual observing, whereas a higher value may be necessary for photographic guiding.

To set the anti-backlash value, scroll down to the Azm Backlash or Alt Backlash and press ENTER. Enter a value from 0-100 for both azimuth and altitude and press ENTER after each one to save these values. NexStar will remember these values and use them each time it is turned on until they are changed.

For the best possible pointing accuracy, always center the alignment stars using the up arrow button and the right arrow button. Approaching the star from this direction when looking through the eyepiece will eliminate much of the backlash between the gears and assure the most accurate alignment possible.

Model Select – When the NexStar is first powered on, the hand control display allows you to select your NexStar from a list of different models. If for some reason the incorrect model was selected, the Model Select utility feature allows you to re-select the proper NexStar model from the displayed list. Once the correct NexStar model has been selected the power needs to be restarted before beginning the alignment procedure. NOTE: If your hand control has been pre-set at the factory, it will say NexStar Ready - Custom when first turned-on. Do not use the Model Select feature to change the model type; doing so may alter the telescope's pointing accuracy.

22

Page 21 Page 23
Image 22
Page 21 Page 23
Contents Page Celestial Coordinate System Telescope Maintenance Some of the many standard features of the NexStar include Flip Mirror Focuser Knob Direction Buttons Page Powering the NexStar Assembling the NexStarEyepieceStarPointer Diagonal Hand ControlEyepiece Flip Mirror Control Focuser KnobStar Pointer Finderscope Star Pointer Finderscope with Mounting BracketPage Hand Control Utility Features Rate ButtonGuideStar Software NexStar Hand Control Alignment Procedure Hand Control OperationEnter Slewing to an Object Object CatalogSelecting an Object More InformationDirection Buttons Tour ModeObserving Tip Setup Procedures User Objects Utility Features HelpfulNexStar Ready Image Orientation Calculating Magnification FocusingDetermining Field of View General Observing Hints Celestial Coordinate System Celestial sphere seen from the outside showing R.A. and DECMotion of the Stars Polar Alignment with optional Wedge DefinitionPhotography with the NexStar Attaching a Camera to the NexStarFinding the North Celestial Pole Observing the Moon Observing the PlanetsSeeing Conditions Observing the SunObserving Deep Sky Objects TransparencySeeing Care and Cleaning of the Optics Super Modified Achromatic SMA Eyepieces 11/4 Page Page Appendix a Technical Specifications Appendix B Glossary of Terms Page Page Appendix C Maps of Time Zones Page Page Page Page Page Page Page Celestron ONE Year Warranty Page Addendum to Nexstar Telescope Manual

NexStar HC specifications

The Celestron NexStar Hand Controller (HC) is an advanced control unit designed to enhance the astronomical observation experience for both novice and experienced stargazers. This innovative device is an integral part of the NexStar telescope series and offers a range of features that simplify the process of locating celestial objects.

One of the main features of the NexStar HC is its user-friendly interface. The controller is equipped with a large, illuminated LCD screen that displays essential information clearly, even in low-light conditions. The layout is intuitive, allowing users to quickly familiarize themselves with its functions. The keypad includes dedicated buttons for common tasks, making it easy to navigate the expansive database of celestial objects.

The NexStar HC boasts an impressive database containing over 40,000 celestial objects, making it a powerful tool for astrophotography and observational astronomy. Users can access planets, stars, galaxies, and nebulae at the touch of a button. The built-in database allows for precise and efficient locating of objects, significantly reducing the time spent searching the night sky.

One of the standout technologies featured in the NexStar Hand Controller is the GoTo functionality. This advanced tracking technology enables the telescope to automatically locate and track celestial objects with high precision. By entering the desired object into the controller, users can allow the telescope to autonomously adjust its position, providing a hassle-free experience.

Additionally, the NexStar HC supports various alignment methods, including SkyAlign, AutoAlign, and One-Star Align. These alignment techniques assist in calibrating the telescope for optimal tracking and positioning. The SkyAlign method, in particular, allows users to point the telescope at any three bright stars, and the HC will calculate the telescope's location in relation to those stars, making alignment accessible even for beginners.

The NexStar Hand Controller is also compatible with Celestron’s StarSense technology, enabling automatic alignment using a smartphone. This feature allows users to refine their observations seamlessly and provides a modern twist to traditional stargazing methods.

Other notable characteristics include programmable go-to tracking speeds and the ability to save user-defined locations. The controller’s ergonomic design ensures comfort during long observing sessions, while the robust build quality guarantees durability.

In summary, the Celestron NexStar Hand Controller combines a wealth of features and cutting-edge technologies to enhance the stargazing experience. Its user-friendly interface, extensive database, versatile alignment methods, and compatibility with advanced tracking systems make it an indispensable tool for anyone looking to explore the wonders of the night sky.
Top Page Image Contents