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Hubble Optics 5-star Artificial Stars

7 In Stock - Ships Today if Ordered by 2pm! (Tues - Fri)
Hubble Optics
Hubble Artificial Stars

We will price-match Canadian astronomy dealer pricing

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  • To accurately test and collimate telescopes, reflectors, catadioptric, and refractors, you must perform a star test. However, to do so, you need a star. Sadly, a real star is not always available due to poor weather conditions or location. Even when a star is available, you will need a good tracking system for doing star test as the star is always moving. Also air turbulence may affect your test, and the real star may not even reveal the true quality of your telescopes or give you a perfect collimation.
  • An artificial star is an excellent alternative to the real star. With an artificial star, star tests can be accurately conducted anytime and anywhere. However, the problem with the artificial star is that you need many different sizes of artificial stars for different telescopes of different apertures with different focal ratios, and even for the same telescopes but at different distances, and under different lighting environments.


  • The innovative Hubble 5-star Artificial Stars is the perfect solution to the star test problem. It has 5 bright white LEDs with 5 precision pinholes (50/100/150/200/250 microns). The Hubble 5-star Artificial Stars enables you to test virtually all telescopes, regardless of aperture size, focal ratios, distance, and lighting conditions.
    • You can instantly find out which star is best for your particular telescope at any particular distance and lighting environment by simply choosing the smallest possible star that still gives you a clear and defocused image.
    • You can even adjust the brightness of the stars by twisting the LED cap.
    • You can mask out any 4 of the 5 stars with a provided magnetic mask. 
    • With Hubble 5-star Artificial Stars, telescopes are now easy to test and collimate!


Please make sure the mask is clean, and use it only when needed to prevent the blockage of the pinholes.  The mask will only stick on one side so turn it over if it doesn't stick for you

The unit should be kept in a clean Ziploc bag when not used, and should be separated from the magnetic mask.

The Hubble Optics 5-star Artificial Stars is powered by 3 AAA batteries (Not Included).

Please note that there are NO printed instructions in the package. To setup, you simply need to insert 3 AAA battery cells, and turn it on.


Here are some very useful online resources on star test and collimation

1) Telescope Collimation via Star Test by Thierry Legault

2) Aberrator, an extremely useful star test simulator by Cor Berrevoets

3) An Astromart Article by Greg Nowell

4) A Cloudy Nights Review Article by Bill Faatz

5) A Cloudy Nights Review Article by Steve Bennetsen

6) The Easy Way to Align Your Telescope's Optics: Indoor Artificial Star Collimation by Derek Wallentinsen

A must have book by Harold Richard Suiter: Star Testing Astronomical Telescopes, Second Edition

There is also a brief but excellent chapter on the star test in Richard Berry’s: Build Your Own Telescope

Here is the printable form of Frequently Asked Questions

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

Items that have been opened, damaged or are otherwise unsaleable will be subject to a minimum 10% restocking fee, to be assessed by Telescopes Canada upon receipt of the returned goods

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Typographical Errors and Order Cancellations

Telescopes Canada reserves the right to cancel an order due to an error in pricing by Telescopes Canada or one of our suppliers, equipment being no longer obtainable, or other events which are out of our control.

Client-Initiated Cancellations

Client-initiated order cancellations are accepted prior to delivery of the equipment to the customer, thereafter it is a return.

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