HOYS Citizen Science2021-09-17T17:56:53+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 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 now a Global Sky Partner of Las Cumbres Observatory


0 images
uploaded to server
0 magnitudes
measured in images


Lightcurve of the week 140

17 September 2021|

This week we look back at an old friend of the project. The very variable star V2492Cyg. It is situated in the Pelican Nebula (IC5070) one of our most observed [...]

Lightcurve of the week 139

8 September 2021|

This week we stay with the winter targets that do become visible in the mornings. We have a look at the star GR Mon in the NGC2264 cluster. The star [...]

Lightcurve of the week 138

1 September 2021|

Last week we looked at the star LkHa271. So lets look this week at the object which is the entry before this in the catalogue of emission line stars: LkHa270. [...]

Lightcurve of the week 137

25 August 2021|

This week we stick with the winter targets which are now slowly becoming visible again early in the morning. The object this week is LkHa271. It is situated in the [...]

Lightcurve of the week 136

20 August 2021|

This week we have had the first submission of new images for some of the Winter fields. In particular the not so well observed field around the target ASAS-SN-13db, which [...]

Lightcurve of the week 135

13 August 2021|

This week we have a look at the young star 2MASS J20505039+4450115. It is situated to the North of the Pelican Nebula. It is classified as a candidate long period [...]

Lightcurve of the week 134

6 August 2021|

This week we look at an interesting source in the only real southern HOYS field. The object is Gaia19eyy. It was originally picked up by Gaia as an outburst from [...]

Lightcurve of the week 133

30 July 2021|

This week we have a look at another young star. It is situated in the Sigma-Ori cluster just South of the belt stars in the Orion constellation. The object is [...]

Lightcurve of the week 132

22 July 2021|

This week we show the light curve of one of the objects from our latest paper "A survey for variable young stars with small telescopes: IV -Rotation Periods of YSOs [...]

Lightcurve of the week 131

16 July 2021|

This week we have another look at one of the background objects in one of our HOYS fields. We found this one by looking at the images of the IC1396A [...]

Lightcurve of the week 130

6 July 2021|

With the summer targets now all visible for all of the night, we have a look at a star in the IC5146 (Cocoon Nebula) field. This is also the field [...]

Lightcurve of the week 129

29 June 2021|

For this week we stay with the auxiliary data set and have a look at a periodic variable that has been mis-classified in the literature, has the wrong period, and [...]

Go to Top