HOYS Citizen Science2022-12-06T12:56:03+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!


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, 8 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


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Lightcurve of the week 203

1 December 2022|

This week we are looking at the light curve with probably the least amount of data points we ever had in this feature - now almost at it's 4th anniversary. [...]

Lightcurve of the week 202

24 November 2022|

This is the first time we are looking at the same star twice in two weeks, i.e. we have another more detailed look at the light curve of the variable [...]

Lightcurve of the week 201

18 November 2022|

This week we look at the light curve of the variable star V1787Ori. It is situated South of the Orion Nebula in the HOYS target field called L1641N. This is [...]

Lightcurve of the week 200

8 November 2022|

This weeks special edition of the light curve of the week comes in form of a short video thanking all the participants for their tireless contributions.

Lightcurve of the week 199

3 November 2022|

This week we look at the newly announced Gaia altert object Gaia22ehy, which is situated north of the Orion Nebula Cluster. The object is also know as the variable star [...]

Lightcurve of the week 198

27 October 2022|

As mentioned a few times in the past, one of the goals of HOYS is to characterise how the typical young star is varying. We have started to prepare the [...]

Lightcurve of the week 197

19 October 2022|

This week we keep with 'tradition' and look at one of the recently (yesterday, October 18) announced Gaia photometric alerts in one of our target fields. The source in question [...]

Lightcurve of the week 196

13 October 2022|

A few weeks back, we had a more detailed look at the photometric calibration of our data. The plot above shows another example of a final calibration plot for one [...]

Lightcurve of the week 195

7 October 2022|

What a difference four months can make. This week we look at the light curve of V505Ori. We identified this object as a periodic variable in our recent paper. It [...]

Lightcurve of the week 194

29 September 2022|

This weeks featured image shows the size of our daily database backups. As you can see, since Monday, despite people adding data, the database has slightly decreased in size. So [...]

Lightcurve of the week 193

22 September 2022|

This week we look at a plot from a recently submitted HOYS paper. In the paper we determine the properties of star spots on young stellar objects in the Pelican [...]

Lightcurve of the week 192

16 September 2022|

Winter is coming. We have now uploaded and processed the data from August for many of the Orion Targets. Hence we get our first look at how the objects are [...]

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