Celestron CGEM DX 1400 HD Computerized Telescope CGEM DX Mount Manual - Page 11

2. Once the telescope is finished slewing to your first alignment star, the display will ask you to use the arrow buttons to align the selected star with the cross hairs in the center of the finderscope. When centered in the finder, press ENTER. 3. The display will then instruct you to center the star in the field of view of the eyepiece. When the star is centered, press ALIGN to accept this star as your first alignment star. 4. After the first alignment star has been entered the hand control will automatically select a second alignment star and have you repeat this procedure for that star. When the telescope has been aligned on both East/West (E/W) Filtering stars the display will ask you if you wish to add additional calibration stars. Calibration stars are used to improve the pointing accuracy of your telescope by compensating for subtle opto-mechanical In order to ensure the best misalignments between possible full sky pointing the telescope optics and accuracy, your computerized the mount. Therefore it telescope automatically is usually a good idea to filters and chooses its initial add at least one additional alignment stars so that the calibration star to improve first two alignment stars are the telescope's all-sky located on one side of the pointing accuracy. Meridian and any calibration 5. Press ENTER to select a stars are on the opposite side calibration star. Select a of the Meridian, as indicated star the same way you by the "W" or "E" displayed did with the first two in the upper-right corner of alignments stars and pres the LCD. East/West filtering ENTER. You will notice can be changed simply by that all the calibration stars pressing the MENU button at displayed are located on any time during the alignment the opposite side of the process. side of the sky (Meridian) as the original alignment stars. This is essential for an accurate calibration of the mount. Finally you can chose to continue to add additional calibration stars or Press UNDO to complete the alignment. Tips for adding calibration stars: • Although for casual observing it is not necessary to add calibration stars, it is recommended that you add as many as three calibration stars for optimal point accuracy. • Calibration stars that are near the equator offer the best results than stars near the poles. • Although it is not necessary to use calibration stars if the telescope mount has not been moved since its original alignment/calibration, it may be necessary to recalibrate the telescope if the optical tube has been removed for any reason. One Star Align One-Star Alignment works much the same way as Two-Star Align but uses only a single star in the sky for alignment. This method of alignment is not as accurate as the two-star alignment and is recommended only for telescopes that are permanently and accurately polar aligned. Solar System Align Solar System Align is designed to provide excellent tracking and GoTo performance by using solar system objects (Sun, Moon and planets) to align the telescope with the sky. Solar System Align is a great way to align your telescope for daytime viewing as well as a quick way to align the telescope for nighttime observing. Never look directly at the sun with the naked eye or with a telescope (unless you have the proper solar filter). Permanent and irreversible eye damage may result. 1. Select Solar System Align from the alignment options. 2. The SELECT OBJECT message will appear in the top row of the display. Use the Up and Down scroll keys (10) to select the daytime object (planet, moon or sun) you wish to align. Press ENTER. 3. Use the direction arrow buttons to carefully center the object in the finderscope. Press ENTER when centered. 4. Then, center the object in the eyepiece and press ALIGN. Once in position, the telescope will model the sky based on this information and display Alignment Successful. Figure 3-3 The Meridian is an imaginary line in the sky that starts at the North celestial pole and ends at the South celestial pole and passes through the zenith. If you are facing South, the meridian starts from your Southern horizon and passes directly overhead to the North celestial pole. Tips for Using Solar System Align • For safety purposes, the Sun will not be displayed in any of the hand control's customer object lists unless it is enabled from the Utilities Menu. To allow the Sun to be displayed on the hand control, do the following: 1. Press the UNDO button until the display reads "CGEM Ready" 2. Press the MENU button and use the Up and Down keys to select the Utilities menu. Press ENTER. 3. Use the UP and Down keys to select Sun Menu and press ENTER. 4. Press ENTER again to allow the Sun to appear on the hand control display. The Sun can be removed from the display by using the same procedure as above. • To improve the telescope pointing accuracy, you can use the Re-Align feature as described below. 9