HOYS Citizen Science2023-12-07T09:50:04+00:00


The HOYS citizen science project works with amateur astronomers on long-term photometric monitoring of young stellar clusters to find outbursting and other interesting objects for detailed follow up as well as the study of star and planet formation processes. Watch our short INTRODUCTION VIDEO.


The database is ONLINE (for data submission).


The project aims to observe nearby young clusters and star forming regions visible from the northern hemisphere to study their variable young stars. The target list currently contains 9 young clusters visible in the winter, 9 targets for the summer as well as 7 additional variable objects of interest.

We rely on amateur astronomers to use their imaging skills and equipment to monitor these target areas as often as possible in all available optical filters.

IC5070 Pelican

IC5070 Pelican Nebula, HOYS target 118

We are again a Global Sky Partner of Las Cumbres Observatory


0 images
uploaded to server
0 magnitudes
measured in images


Lightcurve of the week 256

7 December 2023|

We have now in excess of 100,000 images fully processed into our data base. A huge THANK YOU to everyone who is providing the data, and a special thanks [...]

Lightcurve of the week 255

30 November 2023|

We usually look at different stars each week, but this week we make an exception. In last weeks post, we looked at the young star RW Ori which is situated [...]

Lightcurve of the week 254

23 November 2023|

This week we have a look at the young star RW Ori, which is situated in the sigma-Ori target field of HOYS. The object is known as an Orion [...]

Lightcurve of the week 253

16 November 2023|

Just over a year ago we looked at the light curve of the star TT-Ori, which was announced as the Gaia alert object Gaia22ehy. So it is time to [...]

Lightcurve of the week 252

9 November 2023|

This week we have a timely look at a newly (Nov 4) Gaia identified variable in one of our fields, but stay with last weeks theme of discussing caution [...]

Lightcurve of the week 251

3 November 2023|

The light curve shown above looks very interesting. The seems to increase its variability over time, especially in the shorter wavelengths filters. However, it turns out that this is [...]

Lightcurve of the week 250

25 October 2023|

This is the 250th issue of our weekly feature. Coincidently: Today, exactly 9 years ago (24.10.2014), we held our inaugural HOYS workshop with some amateur astronomers from Kent. Hence: [...]

Lightcurve of the week 249

20 October 2023|

This week we look at another old friend of this feature, the star GM Cep. It is situated in the Elephant Trunk Nebula target region. We wrote about the [...]

Lightcurve of the week 248

12 October 2023|

This week we are looking at the I-Band light curve of the young star T Ori. This is a slightly massive (a few solar masses) young star in the [...]

Lightcurve of the week 247

3 October 2023|

A message from Robert the Bruce, King of Scotland? On a recent visit to the island of Arran in the Firth of Clyde in Scotland we took time to [...]

Lightcurve of the week 246

27 September 2023|

Gregg Ruppel posted his images of HOYS targets taken from his New Mexico site after enjoying seeing those from Edinburgh/Spain recently.

Lightcurve of the week 245

19 September 2023|

HOYS participant, Mark Phillips, tells the story of the Astronomical Society of Edinburgh's remote observatory in Spain and how they are using it to gather HOYS data.

Go to Top