Orion Sirius EQ-G Instruction Manual

Orion Sirius EQ-G Instruction Manual

Computerized goto equatorial mount #9928
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instruction Manual
orion
sirius
EQ‑G
®
Computerized GoTo Equatorial Mount
#9928
customer support (800)‑676‑1343
E‑mail: support@telescope.com
Corporate Offices (831)‑763‑7000
P.O. Box 1815, Santa Cruz, CA 95061
Providing Exceptional Consumer Optical Products Since 1975
IN 268 Rev. A 12/05

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Summary of Contents for Orion Sirius EQ-G

  • Page 1 Manual orion sirius EQ‑G ® ™ Computerized GoTo Equatorial Mount #9928 customer support (800)‑676‑1343 E‑mail: support@telescope.com Corporate Offices (831)‑763‑7000 P.O. Box 1815, Santa Cruz, CA 95061 Providing Exceptional Consumer Optical Products Since 1975 IN 268 Rev. A 12/05...
  • Page 2 Declination setting circle Counterweight shaft lock lever Counterweight lock knob Latitude scale Counterweight Latitude adjustment L-bolts Counterweight shaft Hand controller cable Center support shaft “Toe-saver” Tripod center support tray Hand controller Tripod leg Leg lock levers Figure 1. The Sirius EQ-G mount.
  • Page 3: Table Of Contents

    Moon, galaxies, nebulae, stars, and star clusters. With a little practice, you’ll find that the Sirius EQ-G mount is an invaluable tool for getting the most out of your astronomical observing sessions.
  • Page 4: Attaching A Telescope

    (Dec.) axis. ple the tube to the mount. Orion sells a variety of telescope 1. Keeping one hand on the telescope optical tube, loosen tube rings. Please visit our website at OrionTelescopes.com the R.A.
  • Page 5: Setting Up And Using The Equatorial Mount

    Latitude scale is in Figure 5. Latitude adjustment 4. Move the tripod so the telescope tube and right ascen- L-bolts sion axis point roughly at Polaris. If you cannot see Polaris Figure 5. The Sirius EQ-G mount.
  • Page 6 The telescope should be moved only about its R.A. and Using the Polar Axis Finder Scope Dec. axes. The reticle of the polar axis finder scope for the Sirius EQ-G has a tiny star map printed on it that makes precise polar align- the Polar axis Finder scope ment quick and easy.
  • Page 7 Celestial Pole (which is indicated by the cross at the cen- alignment. The counterweight shaft is oriented downward. But ter of the reticle). Rotate the reticle so the constellations it will not look like that when the telescope is pointed in other depicted match their current orientation in the sky when directions.
  • Page 8: The Sirius Eq-G Hand Controller

    13,400 objects. Even inex- hand controller while you are viewing. perienced astronomers will find themselves quickly mastering the variety of features the Sirius EQ-G offers in just a few observing sessions. attaching the Hand controller The Sirius EQ-G hand controller cable has a modular connec- tor (RJ-45) on both ends.
  • Page 9: Initial Setup

    Scroll buttons racy for one-star alignments). Dual Purpose buttons 2. Point the telescope you have mounted on the Sirius EQ-G roughly to the North Celestial Pole (or Polaris) if you are Mode Buttons in the Northern Hemisphere. Point to the South Celestial The three mode buttons are located at the top of the controller, Pole if viewing in the Southern Hemisphere.
  • Page 10 9. Enter your current local time using the 24 hour time mode 3. The Sirius EQ-G will provide a list of stars that can be used (example: 2:00PM = 14:00). Press ENTER to view the time as the second alignment star. Choose a star using the you entered.
  • Page 11 2. The Sirius EQ-G will provide a list of stars available in your M, NGC, IC: These shortcut buttons give you access to the current sky for you to choose as the first alignment star.
  • Page 12: Other Functions

    Display Time: This function displays the local time and local using the user‑Defined Database Sidereal time. The Sirius EQ-G allows you to save up to 25 objects in the Park Scope: This function moves the telescope to the Home User Defined Database. You can save unidentifiable objects, position.
  • Page 13 IDENTIFY menu. Press ESC to exit this function. linking with a computer The Sirius EQ-G can be connected to a computer via the sup- plied computer interface cable. Many commercially available planetarium softwares can utilize this function and be used to control the Sirius EQ-G.
  • Page 14 sirius EQ‑G Menu tree...
  • Page 15: Specifications

    Cone error results from the optical axis of the telescope not being aligned to the R.A. axis of the mount. This Alignment method: One-star alignment, two- affects the pointing accuracy of the Sirius EQ-G. Three-star star alignment, three-star alignment automatically compensates for some of the cone alignment...
  • Page 16 Sirius EQ-G. Incorrect star alignment, loose R.A. or Dec. lock-knobs, or cone error. If the Sirius EQ-G puts the star outside the eyepiece field of view, you need to determine which of these factors is causing the pointing inaccuracy.
  • Page 17 Figure 17a‑b. Rotate the telescope 180° about the R.A.axis. Figure 19a. Adjust the optical axis offset screws this way if Polaris moves toward the center of theeyepiece when the tube is pushed as in Figure 18. Figure 18. Gently push the telescope horizontally to determine direction of optical axis offset.
  • Page 18 2. Manually point or electronically slew the telescope mount- ed on the Sirius EQ-G to a star with a small value Dec. coordinate (Dec. between +10° and –10°). This object will be used as the guide star. 3. Activate “Sidereal Tracking” from the Setup menu (see “Setup Functions”).
  • Page 19 3. The Sirius EQ-G sends the Azm high byte, Azm low byte, Alt high byte, Alt low byte. Note: The Sirius EQ-G will continue to track in the PEC + side- real mode until another tracking mode is selected. If the power is turned off while the Sirius EQ-G is in the PEC + sidereal mode, the hand controller loses synchronization with the R.A.
  • Page 20 Orion’s option, any warranted instrument that proves to be defective, provided it is returned postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076. If the product is not reg- istered, proof of purchase (such as a copy of the original invoice) is required.

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