Orion 9995 instruction manual Three-Star Alignment

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hand controller will lose track of the mount’s position, and the alignment procedure will need to be performed again. Keep both the R.A. and Dec. lock levers engaged.

3.Turn on the power switch on the mount

4.The initial screen displayed on the hand controller is the version screen. Press ENTER to proceed.

5.The hand controller’s LCD screen will show a safe solar viewing warning message. Press the ESC button to con- tinue.

Note: The GoTo hand controller’s LCD backlighting will become dim and the illuminated buttons will turn off if left idle for 30 seconds. Pressing any button will re-illuminate the hand controller.

6.Enter your observing site’s longitude and latitude coordi- nates. First enter the longitude coordinate and hemisphere, followed by the latitude coordinate and hemisphere. Use the numerical keypad to enter the digits, and use the left and right directional buttons to move to the next digit. Use the scroll buttons to choose W or E (for longitude) and N or S (for latitude). If you do not know the longitude and latitude coordinates of your viewing location, consult an atlas or geographical map of your area. Press ENTER to confirm your coordinates.

Note: Longitude and latitude coordinates must be entered in degrees and arcminutes. If your map or atlas gives coor- dinates in decimal values (i.e. latitude = 36.95 N) you must convert into degrees and arcminutes (i.e. latitude 36.95 N = latitude 36°57’ N).

Note: If a mistake is entered into the hand controller during the initial setup procedure, press the ESC button to go back to the previous screen.

7.Enter the time zone in which you are observing in hours (see Appendix D) using the scroll buttons (+ for east of Prime Meridian, - for west of Prime Meridian) and numeric keypad. Use the left and right directional buttons to move to the next digit. Press ENTER to confirm your choice.

8.Enter the date in mm/dd/yyyy format using the numeric keypad. Use the left and right directional buttons to move to the next digit. Press ENTER to confirm your choice.

9.Enter your current local time using the 24 hour clock for- mat (example: 2:00PM = 14:00). Press ENTER to view the time you entered. If the time is incorrect, press ESC to go back to the previous screen. If the time is correct, press ENTER again.

10.If the date entered in step 8 falls between March and November, the hand controller will ask “DAYLIGHT SAVING?” on the LCD screen. Use the scroll buttons to select “YES” or “NO” to indicate if you are currently on Daylight Savings Time or not, and press ENTER.

11.The hand controller will now display “Begin Alignment?” Press 1 or ENTER to start the alignment procedure. Press 2 or ESC to skip the alignment and exit to the Main Menu.

You are now ready to begin the alignment procedure.

Alignment

In order for the GoTo hand controller to accurately locate and point to objects in the sky, it must first be aligned on known positions (stars). With the supplied information, the controller can replicate a model of the sky and the movements of astro- nomical objects.

There are three ways to align depending on your demand for accuracy. If you are using the GoTo controller for the first time, we recommend you begin with the three-star alignment. In most cases, a three-star alignment produces the most accu- rate alignment among the three methods. The description below will lead you through a step-by-step procedure on how to perform the three-star alignment.

Note: Before performing any of the alignment methods, be sure your finderscope is well aligned with the telescope tube.

Three-Star Alignment

1.From the alignment screen, select “3-Star Align” using the scroll buttons. Press ENTER to confirm your choice.

2.The hand controller will provide a list of stars available in your current sky for you to choose as the first alignment star. Choose a star you are familiar with using the scroll buttons. Press ENTER to confirm your choice. The mount will start slewing the telescope towards the chosen object. When the telescope stops slewing, adjust its position using the controller’s directional buttons until the chosen star is centered on the crosshairs of the finderscope. Now look in the eyepiece and adjust the position of the tele- scope (again using the directional buttons) so the chosen star is centered in the field of view of the eyepiece. Press ENTER to confirm the star is centered .

Note: The slewing speed can be adjusted by pressing the RATE button. Choose a desired rate between 0 (slowest) and 9 (fastest).

Note: The hand controller will make a “beep” sound once it has finished slewing to an object. Do not try to adjust the tele- scope before you hear the “beep” sound. The controller will only respond to the ESC button while slewing (which stops the slewing).

3.The controller will provide a list of stars that can be used as the second alignment star. Choose a star using the scroll buttons and press ENTER to confirm your choice. Repeat the centering procedure for the second alignment star using the directional buttons and press ENTER to confirm alignment.

4.The controller will once again provide a list of stars that can be used as the third alignment star. Choose a star using the scroll buttons and press ENTER to confirm your choice. Once again, repeat the centering procedure for the third alignment star and press ENTER to confirm align- ment.

5.Once the three alignment stars have been entered and alignment is completed, the hand controller will display “Alignment Successful.” Press ENTER to access the Main Menu. Otherwise, “Alignment Failed” will be displayed, and

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Contents #9995 Orion Sirius EQ-GSirius EQ-G mount Assembly Table of ContentsParts List UnpackingBalancing a Telescope Attaching a TelescopePolar Alignment Setting Up and Using the Equatorial MountAlignment of the Polar Axis Finder Scope Polar Axis Finder ScopeConfused About Pointing the Telescope? Using the Polar Axis Finder ScopeSirius EQ-G Dual-Axis Controller Powering the Sirius EQ-G MountAttaching the Dual-Axis Controller Functions of the Dual-Axis Hand ControllerSpeed buttons Directional buttons Set button Setting the Slewing SpeedSpeed Buttons Tracking Objects with the Dual-Axis Hand ControllerSirius EQ-G GoTo Hand Controller Functions of the GoTo Hand Controller Mode ButtonsGoTo Hand Controller Operation Initial SetupScroll Buttons Dual Purpose ButtonsThree-Star Alignment AlignmentOne-Star Alignment Two-Star AlignmentTips for Choosing Alignment Stars Pointing Accuracy Enhancement PAEOther Functions Object CatalogUsing the User Defined Database Setup FunctionsSet Tracking Saving an Object to the DatabaseIdentifying an Unknown Object Preparing the Computer for the UpdateLinking with a Computer Auto GuidingPage Sirius EQ-G GoTo Hand Controller Menu Tree Specifications Testing for Cone Error Cone Error CalibrationCone Error Calibration Procedure Appendix a Enhancing the Pointing AccuracyB.Rotate the telescope 180 about the R.A.axis PEC Training Appendix B Periodic Error Correction PECPlay Back the PEC Record Drifting caused by periodic errorSending a Slow-GoTo Command Additional RS-232 Commands Sending a Tracking RateResetting the Position of Azimuth or Altitude Appendix C RS-232 ConnectionAppendix D Standard Time Zones of the World Page One-Year Limited Warranty

9995 specifications

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