Hubble Optics 5-Star Artificial Star

Hubble Optics 5-Star Artificial Star

  (13 Reviews)
✓ 2 year warranty


25x in stock shipped 1-2 working days

About this product

Model:  ho_artificial_star

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. With an artificial star, star tests can be accurately conducted anytime and anywhere. However, the problem with a single artificial star is you need different telescopes require different star sizes, depending on the telescope’s aperture, and focal ratios. Even the same telescope when setup at different distances, and under different lighting environments, can require diffent star sizes. 

Hubble Optics 5-star Artificial Stars features five bright white LEDs with 5 precision pinholes (50/100/150/200/250 microns). This enables you to star-test virtually any telescope, regardless of aperture size, focal ratio, distance, and lighting conditions. Simply choose the smallest possible star that still provides a clear and defocused image. 

You can even adjust the brightness of the stars by twisting the LED cap!

And, you can mask any four of the five stars with the provided magnetic mask. 

A clever solution, well executed. 

Requires 3x AAA batteries (not included).

Customer reviews

Average Rating (13 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Artificial star!
27 July 2023  | 

Delivery was not delayed in anyway and speedy service.
Havenít had time to use the Hubble artificial star yet however build quality does feel cheap admittedly then at that price point cannot really complain really and it serves a purpose.

Rating (max 5):  
Good low-cost and predictable device
30 January 2023  | 

I used this to help me assess the issues with my triplet. Unlike using an eyepiece or camera to test on real stars, this device made it very stable (no need for tracking) and free of atmospheric turbulence. The diffraction rings when slightly defocused were quite prominent, and even the smallest hole was usable in daylight! Being able to adjust your scope *before* you want to be up and running is definitely worthwhile.

Rating (max 5):  
Nice Collimation Tool
23 September 2022  | 

I bought what is essentially a torch with holes in to help with rough/daytime collimations of my Celestron EdgeHD 8Ē after I installed some Bobís Knobís.

Needs 3 x AAA not supplied

I think it is ok for the price and seemed sturdy enough. The only criticism is that there is a mask that goes on the end of the torch to block 4 of the 5 light sources so that you only see one. The problem is that it is lightly magnetic and comes off way too easily. I can see it getting lost soon.

Anyway, worked nicely to collimate my scope during daytime so in that respect in works fine. The price is pretty good to compared to other artificial stars that are out there. Just lost a rating star for the cover unfortunately

Rating (max 5):  
First Impressions
14 May 2022  | 

The look and feel is pretty cheap. I'd like to think the money went in to the front plate and the accuracy of the holes. The magnetic plate that blocks out the 'stars' will get lost very quickly. And suggest you think of a replacement before it happens.

Rating (max 5):  
artificial star
09 February 2021  | 

just arrived today
no opportunity to try it out
must get batteries

Rating (max 5):  
Artificial star
14 January 2021  | 

Looks a bit expensive for what it is but it does the job superbly.

Rating (max 5):  
Remarkably effective given the look and feel of it
26 August 2020  | 

This might well be one of the cheapest collimation aids around, and it is pretty basic to say the least. You need to be careful putting the batteries in for a start, and the little rectangle that blocks all but one star falls out all too easily. Nevertheless it is remarkably effective. I have QDSLRdashboard on my iPhone connected to my Nikon Z6, and focused my C6 SCT on the artificial star, and walked round the front of the scope to fiddle with Bob's knobs while I recentred the star with the hand control after each adjustment while viewing the star image at maximum mag on my phone. After some bad moves I got the hand of it and got my concentric rings well nailed down. All done it daytime. I did it outside on a bright afternoon which was sub-optimal, but I got it done. £20 is a bit steep given the quality. I'd have been happier at £5, maybe £10.

Rating (max 5):  
Hubble Optics 5-Star Artificial Star
30 April 2020  | 

FLO have always been quick with delivery so top marks there. The Artificial Star has 5 different size holes in the lens and a supplied magnetic piece of tape covers over the 4 you don't require. The torch itself is plastic and on its own would be found in a pound shop, but if you want a higher spec unit they come in at +£70 so you pays your money etc. As it will only be used once in a while it does what it says on the tin and the rest of my Astronomy Group can make use of it as well, so money well spent.

Rating (max 5):  
05 December 2019  | 

I was very unpleasantly surprised when I held this item in my hand. Looked and felt like something I had just won at a fair on one of these toymachines for children.
It is terrible that this is sold at 19 £. Talking about a profit margin!

Rating (max 5):  
Hubble Optics
23 October 2019  | 

I bought this as I needed to give a talk on telescope collimation and it seemed easier to do it inside with a non-moving star than outside. Its a basic and functional tool that nicely emulates a star to aid checking optics when there are no convenient stars around. The tool proved its worth as the following night. i took out my 20 inch reflector as the clouds was clearing and found my I had left the laser switched on after the talk on and flattened the batteries. With no batteries to hand I used the Hubble Optics to star align the main mirror.
The blanking plate should be slightly more magnetic as it would be very easy to lose in the dark. In summary, cheap but functional.

Read all 13 customer reviews...


Please fill in the form below to ask a question.