HOYS Citizen Science2022-10-04T10:37:54+01:00


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 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 [...]

Lightcurve of the week 191

8 September 2022|

Do people see or read our light curve of the week posts, and do they have any impact? Well, let see. In February our post number 166, looked at the [...]

Lightcurve of the week 190

1 September 2022|

This week we have a little bit of a look how 'international' our project is. Some of you might know, or even remember, that we originally started out with a [...]

Lightcurve of the week 189

26 August 2022|

This week we have a look at our basic photometry calibration and try to answer the question "Why does my calibration look weird?" - Which sometimes comes up when someone's [...]

Lightcurve of the week 188

19 August 2022|

This week we look at one of the plots from the first HOYS paper: "A survey for variable young stars with small telescopes: First results from HOYS-CAPS" - note we [...]

Lightcurve of the week 187

12 August 2022|

This week we have a look at the number of images we have for each target region. This is shown in the above plot. For each target, listed at the [...]

Lightcurve of the week 186

4 August 2022|

This week we look at the light curve of the young star BB Ori. It is situated in the L1641N target field, just south of the Orion Nebula (M42). The [...]

Lightcurve of the week 185

28 July 2022|

We are making good progress on the writing of the next few papers with HOYS data, so this week we have a look back at a plot from an earlier [...]

Lightcurve of the week 184

21 July 2022|

This week we are looking at the young star LkHa154 in the Pelican Nebula. It is classified as an emission line star. This means, if you take a spectrum you [...]

Lightcurve of the week 183

13 July 2022|

This week we look at the object V1319Cyg, which is situated in the field around the Berkley 86 open cluster. We show the light curve in V and I in [...]

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