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How to Setup Celestron Nexstar 8SE

How to Setup Celestron Nexstar 8SE

The Celestron NexStar 8SE is one of the most popular computerized telescopes on the market, offering a combination of powerful optics and user-friendly features.

However, to make the most out of this telescope, you need to set it up correctly.

In this guide, we’ll walk you through the process step by step, from assembling the telescope to aligning it using its Go-To system, ensuring that you’re ready to explore the night sky in no time.

Key Components of the Celestron NexStar 8SE

Before we dive into the setup process, it’s important to understand the key components of the NexStar 8SE:

  • Optical Tube Assembly (OTA): This is the main body of the telescope, featuring an 8-inch Schmidt-Cassegrain design.
  • Single Fork Arm Mount: The mount houses the Go-To system and helps track celestial objects.
  • Tripod: A sturdy, adjustable tripod to provide stable support for the telescope.
  • Hand Controller: This device is used to navigate and align the telescope’s Go-To functionality.

Step-by-Step Setup Guide

1. Unbox and Inspect Components

Start by carefully unboxing all components of the NexStar 8SE, including the optical tube, mount, tripod, hand controller, and accessories like the eyepiece. Ensure that everything is present and undamaged.

2. Set Up the Tripod

Begin by extending the tripod legs to your desired height and tightening the adjustment knobs to secure them. Once the legs are stable, spread them out evenly to provide a solid base. You’ll also want to make sure the tripod is level. Most tripods come with a built-in bubble level to make this step easier. If not, you can use a small external level for accuracy.

3. Attach the Mount to the Tripod

Place the single fork arm mount on top of the tripod by aligning the three holes on the base of the mount with the bolts on the tripod. Secure the mount by tightening the screws at the bottom of the tripod. Make sure the mount is tightly secured as it will support the telescope’s weight and needs to remain stable during operation.

4. Attach the Optical Tube to the Mount

Next, take the optical tube assembly (OTA) and slide it into the mounting dovetail saddle located on the single fork arm. The dovetail should lock into place, and you can tighten the saddle screws to secure the OTA. Ensure the telescope is balanced and firmly attached to the mount to prevent any movement during use.

5. Attach the Finder Scope

The NexStar 8SE comes with a StarPointer red dot finder scope, which helps you manually align the telescope with celestial objects. To attach it, slide the finder scope into its bracket on the optical tube and secure it with the screws provided. Once it’s attached, you’ll want to align the finder scope with the telescope’s view, but this step can be completed later during the alignment process.

6. Insert the Diagonal and Eyepiece

Next, insert the star diagonal into the visual back of the telescope. Once secured, you can insert the eyepiece into the diagonal and tighten the set screw to hold it in place. The included 25mm eyepiece is a good starting point for your initial observations, providing a wide field of view to locate objects easily.

7. Power the Telescope

The Celestron NexStar 8SE is powered either by 8 AA batteries or an external power source such as a Celestron PowerTank or an AC adapter. Install the batteries in the battery compartment located on the base of the mount, or connect your external power source. Turn on the telescope using the power switch located on the side of the base.

8. Connect and Set Up the Hand Controller

The hand controller is the key to navigating the telescope’s computerized Go-To system. Connect it to the designated port on the mount and turn on the telescope. The hand controller will light up and display initialization instructions.

Alignment Process Using SkyAlign

Nexstar 8SE Computerized Telescope backside with an eyepiece attached.

One of the standout features of the Celestron NexStar 8SE is its SkyAlign technology, which makes alignment easy for users at any experience level. Follow these steps to align your telescope with the night sky:

1. Enter Location, Date, and Time

Upon powering up the telescope, the hand controller will prompt you to enter your location, date, and time. You can either manually input your latitude and longitude or select your city from the database. Accurate location and time information are essential for precise tracking.

2. Select Alignment Method

The NexStar 8SE offers multiple alignment methods, including SkyAlign, Solar System Align, and Two-Star Align. For beginners, SkyAlign is the easiest method as it doesn’t require you to know the names of the stars you are aligning to.

3. Align Using SkyAlign

To align using SkyAlign, simply point the telescope at three bright celestial objects (stars or planets) in different parts of the sky. The hand controller will prompt you to center each object in the eyepiece and press "Enter." The NexStar 8SE will automatically calculate the telescope’s orientation based on the positions of these objects.

Once the alignment is complete, the telescope will be ready to find and track objects in the night sky.

Fine-Tuning and Calibration

Nexstar 8SE Computerized Telescope facing left.

To improve accuracy, it’s a good idea to calibrate the StarPointer finder scope with the telescope’s optics. Point the telescope at a distant terrestrial object (such as a distant tree or building), center it in the eyepiece, and adjust the finder scope’s knobs until the red dot is centered on the same object.

Tips for Optimal Use

Nexstar 8SE Computerized Telescope assembled on its mount facing left and pointed to the sky.

1. Use External Power

While the NexStar 8SE can operate on AA batteries, they drain quickly, especially during long observation sessions. For uninterrupted use, invest in a PowerTank or AC adapter to ensure your telescope stays powered for hours of viewing.

2. Collimation Check

Over time, the optics of your telescope may need adjustment for optimal performance. Regularly check and collimate your Schmidt-Cassegrain telescope to ensure it provides sharp, clear views of celestial objects.

3. Regular Alignment

For the best tracking accuracy, it’s important to re-align your telescope at the start of each session, especially if you’ve moved it or if the sky conditions have changed.

Conclusion

Setting up the Celestron NexStar 8SE is a straightforward process that requires attention to detail but ultimately rewards you with a powerful and easy-to-use telescope.

With its combination of high-quality optics, Go-To technology, and user-friendly design, the NexStar 8SE makes exploring the night sky accessible for both beginners and experienced astronomers alike.

By following these steps, you’ll be ready to embark on your astronomical journey and unlock the full potential of your telescope.

Learn More About the Celestron NexStar 8SE!

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