Nexstar SynScan Star ~ l i ~ n r n e n t, Three-Star Alignment, Two-Star Alignment

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Star ~ l i ~ n r n e n t

In order for the SynScanT"to correctly point to objects in the sky, it must first be aligned to one to three known positions (stars) in the sky. As the Earth rotates on its axis every 24 hours, astronomical objects appear to move through the sky following an arc. W~ththe supplied information, the telescope can replicate a model of the sky and the movements of astronomical objects. Star alignment can be done anytime during the observing session by choosing Alignment under SETUP MODE, in the Main Menu.

There are three ways to align the SynScanTMdepending on your demand for accuracy. If you are using the SynScanTMfor the first time, we recommend that you begin with the Three Star Alignment. In most cases, this produces the most accurate alignment among the three methods. Before performing any of the alignment methods, be sure that your finderscope is well aligned with the telescope tube. See the next page for tips on how to choose the alignment stars. Below describes a step-by-step procedure on how to perform the Three Star Alignment:

Three-Star Alignment

1.In the alignment screen, select 3-StarAlign using the scroll keys. Press ENTER to confirm.

2.The SynScanTM will provide a list of stars available in your current sky for you to choose as the first alignment star. Using the scroll keys, choose an appropriate star from the list provided and press ENTER. The telescope will start slewing towards it. When the telescope stops slewing, adjust its position with the directional keys until the star is centered on the crosshairs in the finder scope. Now look through the eyepiece and adjust the telescope so that the object is centered in the field of view of the eyepiece. Press ENTER to confirm.

The slewing speed can be adjusted by pressing on the RATE button. Then choose a number between 0 (slowest) - 9 (fastest).

SynScan" will becp once when it has finished slening to an object. Do not try to adjust the telescope before you hear the beep. SynScan'" will only respond to the ESC key while slewing.

3.SynScanT"will provide a list of objects for the second alignment star. Choose a star using the scoll keys and press ENTER. Repeat the centering procedure for the second star and press ENTER to confirm.

4.SynScanTMwill once again provide a list of objects for the third alignment star. Choose a star from the list and press ENTER. Once again, repeat the centering procedure for the third alignment star.

5.If appropriate stars have been chosen and aligned to, the SynScanTMhand control will display "Alignment Successful". Otherwise, the warning "Alignment Failed" will show and the alignment will have to be done again.

Two-Star Alignment

Two-Star Alignment requires only two alignment stars but, without Cone Error Calibration (see Appendix A), it may produce lesser pointing accuracy than the Three-Star Alignment. Below describes a step-by- step procedure on how to perform the Two-Star Alignment:

1.In the alignment screen, select 2-Star Align using the scroll keys. Press ENTER to confirm.

2.The SynScanrMwill provide a list of stars available in your current sky for you to choose as the first alignment star. Using the scroll keys, choose a star you are most familiar with and press ENTER. The telescope will start slewing towards it. When the telescope stops slewing, adjust its position with the directional keys until the star is centered on the crosshairs in the finder scope. Now look through the eyepiece and adjust the telescope so that the object is centered in the field of view of the eyepiece. Press ENTER to confirm.

3.SynScanTMwill provide a list of objects for the second alignment star. Choose a star using the scoll keys and press ENTER. Repeat the centering procedure for the second star and press ENTER to confirm.

4.If appropriate stars have been chosen and aligned to, the SynScanTMhand control will display "Alignment Successful". Otherwise, the warning "Alignment Failed" will show and the alignment will have to be done again.

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Contents Page Page Powering the SynScanTM 1ntroduction to the SynScanTMSynScanTM Hand Control Scoll Keys Fig.e Mode keysDirectional keys Dual Purpose keysTial Setup AIDStar ~ l i ~ n r n e n t Three-Star AlignmentTwo-Star Alignment One-Star Alignment Pointing Accuracy Enhancement PAE0bject database in the SynScanTM Selecting an ObjectUtility Functions Saving an object to the databaseIdentifying an Unknown Object Recalling an user defined objectPeriodic Error Correction Linking with a ComputerT o Guiding Page \ mm@1 SynScan F~rmwareLoader Main Menu SynScanTwSPECIFICATIONS Movement Eyepiece view Page Page Hand Control Description PC Command Ascii Response Additional RS232 Commands Sending a track rate through RS232 to the hand control

SynScan specifications

The Nexstar SynScan is a highly regarded mount and telescope system, catering to both amateur astronomers and seasoned professionals alike. Renowned for its ease of use, portability, and advanced technology, it significantly enhances the stargazing experience.

One of the standout features of the Nexstar SynScan is its computerized GoTo mount. This system allows users to easily locate and track celestial objects. With an extensive database of over 40,000 celestial bodies, including stars, planets, nebulae, and galaxies, the SynScan offers an intuitive way to explore the night sky. The built-in database also includes user-defined objects, making it versatile for personalized astronomical pursuits.

The SynScan's Dual-Axis Tracking mechanism is another major advantage. It accurately tracks celestial objects as they move across the sky due to the Earth's rotation, ensuring that users can view objects for extended periods without needing to manually adjust the telescope. This functionality is particularly beneficial for astrophotography, as it reduces image blurring caused by slight movements.

In terms of technology, the Nexstar SynScan utilizes a precision motor drive and encoders to enhance tracking accuracy. The mount features AC servo motors, which provide smooth and silent operation. The included hand control is user-friendly, with a backlit screen that allows for night-time navigation without disturbing your surroundings.

The system's ease of setup and portability are important characteristics, particularly for users who wish to observe in remote locations. The Nexstar mount is lightweight and compact, making it easy to transport and assemble. Users can quickly set up the telescope in a matter of minutes, an advantage for spontaneous night-sky explorers.

Additionally, the SynScan offers various power options, including the ability to use AA batteries or an external power supply. This flexibility ensures that users can operate their telescope in different environments without worrying about finding power sources.

Lastly, the Nexstar SynScan is compatible with popular astronomy software, enabling users to enhance their observing sessions with additional features such as software-guided observations and advanced tracking capabilities. This integration with technology allows for a rich observing experience where the vastness of the universe is made more accessible.

In conclusion, the Nexstar SynScan stands out for its combination of advanced technology, user-friendliness, and portability, making it a top choice for anyone looking to delve deeper into the wonders of astronomy.
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