Attaching the GoTo Hand Controller

The Atlas EQ-G GoTo hand controller comes with two cables; one for usage with the Atlas EQ-G mount, while the other is for use with the Sirius EQ-G mount. Feel free to discard the cable for the Sirius EQ-G, as it will not be needed.

The cable for the Atlas EQ-G mount has a large, serial con- nector (DB-9) on one end and a smaller, modular connector (RJ-45) on the other. Plug the modular connector of the hand controller cable into the hand controller (Figure 10). Push the connector into the jack until it clicks into place. Plug the serial connector into the mount (Figure 11). Use the captive screws to secure the serial connector in place.

slide the bracket forward until it clicks into place (Figure 12). You now have a place to put the GoTo hand controller while you are viewing.

You can reduce the chances of getting your hand controller cable tangled during use by installing the included wire clip. The clip also prevents mechanical strain on the hand control- ler cable when it is in use. The wire clip is adhesive backed for easy attachment to any convenient location on the mount.

Hand controller	Computer interface 12V DC power jack
modular jack	modular jack

Figure 10. Hand controller jacks.

Power indicator light

12V DC

power jackPower switch

Autoguider modular jack

Hand controller serial jack

Figure 11. Atlas EQ-G mount faceplate.

The smaller modular jack on the hand controller (Figure 10) is used for RS-232 communications between the Atlas EQ-G mounts and a computer equipped with astronomy software like Starry Night Pro (see “Linking with a Computer”). The 12V DC power jack on the hand controller allows independent use of the GoTo hand controller for users who wish to browse the object database without connecting to the telescope mount (Figure 10). The power jack is also used when updating the firmware in the hand controller (see “Updating the GoTo Hand Controller’s Firmware”).

The included GoTo hand controller bracket attaches to the built-in notch in the tripod center support tray. To install the hand controller bracket, simply line up the tab on the back of the bracket with the notch in the tripod center support tray and

Notch		Tripod center
Notch		Tripod center
		support tray

Hand controller bracket

Figure 12. Installing the hand controller bracket.

Powering the Atlas EQ-G Mount

The Atlas EQ-G should be powered by an 11V to 15V DC power supply (tip positive) capable of producing continuous current of a minimum 2 amps. We recommend using a por- table rechargeable battery, like the Dynamo or Dynamo Pro available from Orion.

If you are using a portable battery like the Orion Dynamo, use the 12V DC power cable supplied with your mount (male ciga- rette lighter plug on one end, standard 12V DC power plug on other end) to connect the battery to the 12V DC power jack on the mount (Figure 11). Make sure the Dynamo’s power switch is in the “on” position after connecting. Then, to turn the mount (and GoTo hand controller) on, simply press the switch on the mount so it is in the “on” position.

Note: The power indicator LED on the mount (near the power switch) will begin to flash when the battery power is low. When the battery power is extremely low, the LED will flash rapidly. Recharge or replace the battery as needed.

EQ-G specifications

The Orion EQ-G Equatorial Mount is a popular choice among amateur astronomers and astrophotographers seeking a reliable and versatile platform for their telescopes. Known for its robust build and advanced technology, the EQ-G mount can support a wide range of telescope sizes, making it ideal for both visual observations and astrophotography.

One of the standout features of the Orion EQ-G is its precision go-to capability. Equipped with a computer-controlled system, users can easily locate and track celestial objects with remarkable accuracy. The mount comes with a database that includes thousands of celestial objects, allowing users to automatically point their telescope to stars, planets, galaxies, and more with the push of a button.

The EQ-G mount features a sturdy aluminum construction, ensuring stability even under heavy loads. It can support telescopes weighing up to 30 lbs, making it suitable for medium to large telescopes. The mount's adjustable altitude and azimuth motions allow for smooth tracking of celestial objects as they move across the sky, a vital characteristic for long-exposure astrophotography.

To enhance user experience, the EQ-G is equipped with a built-in dual-axis servo motor drive system. This drive system delivers precise movement control, ensuring that the telescope can be accurately guided to desired targets. Furthermore, the mount is compatible with various control options, including hand controllers and computer software, allowing for a customizable and convenient observing experience.

Another notable technology within the EQ-G is the polar alignment scope. This feature aids in achieving accurate polar alignment, which is crucial for minimizing tracking errors during long exposures. By correctly aligning the mount, users can take stunning astrophotographs with minimal star trails.

For portability, the EQ-G mount comes with a quick-release design that allows for easy setup and takedown. Its adjustable tripod legs provide a stable base on various terrains, making it possible to observe from different locations, whether in the backyard or at a remote dark-sky site.

In summary, the Orion EQ-G Equatorial Mount combines an intuitive design with high-quality features, making it a fantastic choice for astronomy enthusiasts. With its go-to capability, sturdy construction, precise tracking, and user-friendly setup, the EQ-G stands out as a reliable and effective tool for exploring the wonders of the night sky. Whether you are capturing stunning images of celestial objects or simply enjoying visual astronomy, the Orion EQ-G meets the diverse needs of astronomers at all levels.