How to Perform Celestron Two Star Alignment

On this page (11 sections)

1. What should you do before Celestron two star alignment?
2. Which settings must be correct?
3. How do you choose the first alignment star?
4. How do you center the first star?
5. Why is careful centering so important?
6. How do you select the second alignment star?
7. How do you finish the alignment?
8. What can help keep the optics clear?
9. Is a smaller cleaning kit enough for alignment gear?
10. What should you do if alignment fails?
11. What is the best Celestron two star alignment routine?

Celestron two star alignment works by using two known stars to calculate the mount's position and pointing direction. Set up the tripod securely, enter accurate time and location details, center both stars with care, and accept the alignment only after each star is in the middle of the eyepiece view.

This method is useful when you want computerized GoTo pointing without relying on an automatic camera or phone-assisted system. The exact menu names can vary by hand control and mount, so keep the telescope's instructions nearby while following the general process below.

What should you do before Celestron two star alignment?

Before starting Celestron two star alignment, make the mount stable, point it in the required home position, and enter correct setup information. A careful physical setup prevents many errors that look like software or motor problems.

Place the tripod on firm ground and spread the legs evenly. Tighten the leg locks and mount hardware without forcing them, then attach the optical tube and accessories securely.

If your mount uses a reference position, set the telescope there before powering on. Check that the tube can move freely and that cables will not catch during slewing.

You can also review how to do the telescope alignment for the larger setup process. That overview helps connect tripod placement, finder alignment, and computerized pointing.

Which settings must be correct?

The date, local time, time zone, daylight-saving setting, and observing location must be correct. A small error in time or location can place the mount far from the star it expects.

Enter the location using the format your hand control requests. If you use latitude and longitude, check the signs and direction letters carefully.

Confirm whether daylight saving time is active where you are observing. If the mount asks for a time zone, use the correct offset for your location rather than guessing from the current clock.

Power problems can also interrupt setup. Use a stable power source and keep the hand control connected as directed by the mount instructions.

How do you choose the first alignment star?

Choose a bright, recognizable star with a clear view and enough sky around it. The first star should be easy to identify through the finder, especially if you are still learning the constellations.

The hand control may offer a list of stars. Pick one that you can match to the sky, and avoid a star hidden behind trees, buildings, or a roof.

A basic star chart guide can help you match the hand control's star names with visible constellations. Let the telescope slew toward the selected star, then use the finder to locate it if the first movement is not exact.

How do you center the first star?

Center the first star in the finder, then center it in the telescope eyepiece before pressing Enter or Align. The finder gets you close, while the eyepiece provides the precision the mount needs.

Use the direction buttons at a slower speed as the star approaches the middle. Keep the star centered in the eyepiece's field of view, not merely near one edge.

If the star is difficult to see, start with a wider field or lower-power eyepiece. Once you locate it, a higher-power eyepiece can make final centering easier.

Finish your movement in the direction recommended by the mount instructions. This can reduce the effect of mechanical play in the gears, though the correct button sequence depends on the mount.

Why is careful centering so important?

Accurate centering gives the mount a better reference for calculating the sky. A star that looks close in the finder may still be several eyepiece fields away from the true center.

Use the same visual reference for both stars. If your eyepiece has crosshairs, place the star at their intersection; otherwise, center it as evenly as you can.

Avoid touching the telescope tube while confirming the position. Vibration can move the star, so wait briefly after pressing a direction button before accepting the alignment.

For model-specific setup, read our guide to how to align celestron telescope. Users of the 8SE can also see how to align celestron nexstar 8se.

How do you select the second alignment star?

Select a second bright star that is clearly separated from the first. A star in another part of the sky gives the mount a stronger reference than two stars close together.

Choose a star that is above the horizon and unobstructed. Avoid selecting one close to the first star, one very low in the sky, or one you cannot identify with confidence.

The mount will slew toward the second choice. Use the finder to locate it, then repeat the same centering process in the eyepiece.

The first and second stars do not need to look equally bright. Reliable identification and accurate centering matter more than choosing the brightest objects available.

How do you finish the alignment?

After centering the second star, press the alignment confirmation button only when the star is steady and centered. The hand control should report that alignment is complete or accepted.

Test the result with a bright, easy target that is not one of the alignment stars. Choose an object in a different part of the sky and check whether the mount slews close enough for you to find it with the finder or eyepiece.

If the target is outside the field, use the direction buttons to locate it. A small correction does not always mean the alignment failed, but repeated large errors usually point to incorrect settings, star selection, or centering.

What can help keep the optics clear?

Clean optics help you see alignment stars clearly, but remove loose dust before touching a lens or eyepiece surface. Keep caps on unused optics and avoid cleaning more often than necessary.

The Altura Photo Camera Lens Cleaning Kit includes an alcohol-free and ammonia-free 56.7 ml cleaner spray, a cleaning brush, a lens pen, an air blower, 3 MagicFiber microfiber cloths, and 50 lens tissue paper wipes. It suits readers who want a broader kit for DSLR and mirrorless camera gear as well as delicate coated glass.

Use the blower first to move loose particles away. If a surface still needs cleaning, follow the product's intended order and use a clean cloth or tissue with light pressure.

Do not spray liquid directly onto a telescope lens, mirror, or eyepiece. Follow the telescope and accessory instructions, since some optical surfaces need different care.

Is a smaller cleaning kit enough for alignment gear?

A smaller kit can suit you if you mainly need an air blower, cleaning pen, and reusable cloths. It keeps the basic tools together without adding a larger collection of cleaning materials.

The K&F CONCEPT 4 in 1 Camera Lens includes a camera dust blower, a lens cleaning pen, and 2 microfiber lens cleaning cloths. Its brush is 4.5 inches long, and the cloths are described as washable and reusable for lenses, screens, glasses, watches, jewelry, and other delicate surfaces.

Use the blower before the pen or cloth. Keep the cloths clean, and do not reuse a cloth after it has collected grit that could mark a coated surface.

Choose the Altura Photo kit if you want cleaner spray, tissue wipes, and more cleaning pieces. Choose the K&F CONCEPT set if the blower, pen, and 2 reusable cloths cover your normal care routine.

What should you do if alignment fails?

If alignment fails, restart the process and check the setup entries before changing anything else. Confirm the date, time, location, time zone, and daylight-saving setting.

Next, check that the telescope began in the correct reference position and that the tripod stayed stable. Select two different stars if either original choice was hard to identify or close to the horizon.

Make sure you centered each star in the eyepiece rather than only in the finder. Also check that the mount did not move when you pressed the confirmation button.

If your mount supports StarSense, how to use celestron starsense explains the automatic alternative. For a StarSense Explorer LT, see how to use celestron starsense explorer lt for its phone-assisted approach.

What is the best Celestron two star alignment routine?

The best Celestron two star alignment routine is stable setup, correct data, widely separated stars, and precise centering. Take extra time with the first alignment session because the same steps become faster after you learn the hand control.

Pick stars you can identify without doubt. Use the finder to locate each one, then use the eyepiece to center it before confirming.

If GoTo accuracy remains poor, repeat the alignment with a different pair and check for tripod movement or incorrect daylight-saving settings. Clean optical surfaces only when needed, using the blower first.

Once the mount points reliably, save the routine that works for your location. Choose manual two star alignment when you want direct control, or use a StarSense method when automatic star detection better fits your observing setup.

Frequently asked questions

What is Celestron two star alignment?

Celestron two star alignment is a computerized mount setup that uses two known stars to calculate where the telescope is pointed. You choose or accept the first star, center it in the finder and eyepiece, then repeat the process with a second star.

The mount can then calculate pointing positions for other targets.

How accurately should I center alignment stars?

Center each alignment star as carefully as possible, finishing your movement in the same direction the mount normally approaches a target. Use a low-power eyepiece first if the star is hard to find, then switch to a higher-power eyepiece for more precise centering.

Keep the star centered before confirming.

Can I use any two stars for Celestron alignment?

Use bright stars that are visible, well separated across the sky, and easy to identify. Avoid choosing two stars close together or near the same part of the sky.

If the hand control offers named stars, select ones you can recognize with confidence.

Why does my Celestron alignment fail?

Alignment can fail because the time, date, location, daylight-saving setting, tripod position, or star identification is wrong. It can also fail when a star is not centered accurately.

Restart the setup, check each entry, and choose two different bright stars with a wide separation.