HOYS Citizen Science2024-07-23T10:51:03+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 (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


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Lightcurve of the week 288

18 July 2024|

This week we don't look at a young star, but nevertheless an old friend of the project. Many years ago we found an unusual variable in the Elephant Trunk [...]

Lightcurve of the week 287

10 July 2024|

This week we look at the light curve of the T-Tauri Star 2MASS J21395813+5728335, which is situated in the Elephant Trunk Nebula target region of HOYS. It is near [...]

Lightcurve of the week 286

2 July 2024|

This week we look look at the HOYS light curve of the T-Tauri star V608Mon. It is situated just North of the Cone Nebula, in the young cluster NGC2264. [...]

Lightcurve of the week 285

28 June 2024|

We have talked about rotation periods and spots on our objects before in several posts (e.g. weeks 195, 221, 268, 271). Today we have a look at a (preliminary!!!) [...]

Lightcurve of the week 284

21 June 2024|

This week we look at some of the progress on our analysis of variability. This involves what we call variability fingerprints (see week 214 post). These are plots made [...]

Lightcurve of the week 283

13 June 2024|

This week we have a look at a star in one of our more southern target region. The field centred on the eruptive young variable star Gaia19fct. There are [...]

Lightcurve of the week 282

7 June 2024|

This week we stay again in the Pelican Nebula (there are a lot of interesting objects here 🙂 ), and look at the object 2MASS J20522802+4403311. It is classified [...]

Lightcurve of the week 281

31 May 2024|

This week we have a look at the star LkHa137A, situated in the Pelican Nebula. It is classified as a Hydrogen Alpha emission line star (hence the name 🙂 [...]

Lightcurve of the week 280

24 May 2024|

This week we are looking at the light curve of the variable star AA Ori in the Southern part of the Orion Nebula Cluster. The two figure show the [...]

Lightcurve of the week 279

17 May 2024|

This week we have a look at the distribution of our observatories on the globe. The picture above shows the distribution in Europe and North America, where most of [...]

Lightcurve of the week 278

10 May 2024|

This week we look at the light curve of the object IRAS 07063-1016, which is a candidate young stellar object. In the above plot we show the V, R, [...]

Lightcurve of the week 277

3 May 2024|

We look at the light curve of the young star V397Ori today. It is situated in the outskirts of the Orion nebula (M42) and we looked at last years [...]

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