HOYS Citizen Science2023-02-24T10:51:15+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 OFFLINE! – See NEWS for details.


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’ve got a lot of images (~3,000) in our database that need a little processing done on them so that the data can be extracted. It’s not difficult to do and with a little help from you we can clear the backlog and get all that useful data into the database. If you can help please Get In Touch. Thanks


We are again a Global Sky Partner of Las Cumbres Observatory


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HOYS-LCO3 Picture Competition

27 March 2023|

Our teacher training program HOYS-LCO3 is slowly coming to an end. This year 16 teachers with almost 300 pupils from 7 countries signed up to learn how to observe with [...]

Lightcurve of the week 219

23 March 2023|

This week we look at the light curve of the variable star V718Per. It is situated in the IC348 target region and is a bona fide cluster member. It has [...]

Lightcurve of the week 218

17 March 2023|

This week we continue to look at our analysis of the entire sample of young stars in HOYS. This time we look at their mid-infrared colours measured by the WISE [...]

Lightcurve of the week 217

8 March 2023|

In many of our papers with HOYS data you find introductory statements like this one: "Historically, young stars were first discovered based on their irregular and large-amplitude optical variability (Joy [...]

Lightcurve of the week 216

3 March 2023|

In our "tour of HOYS papers", while we are recovering the data base to look at new, interesting light curves, we have a look at a figure from our second [...]

Lightcurve of the week 215

24 February 2023|

While we are still working on restoring our server (update to follow next week), we have a look on a plot from the first published referee paper using HOYS data. [...]

Lightcurve of the week 214

17 February 2023|

While we are still repairing the server hard disks, we look at some interesting technique of analysing our light curves. We call this variability fingerprinting. The young star light curves [...]

Lightcurve of the week 213

10 February 2023|

This week we have a look at some light curves presented in our latest paper "A survey for variable young stars with small telescopes: VI - Analysis of the outbursting [...]

Lightcurve of the week 212

2 February 2023|

While the database is still off-line for server repairs, we have another look at some early results of the ongoing data analysis. Today we look at the young T-Tauri star [...]

Database Offline

27 January 2023|

We have had to take the database offline to repair our server. Multiple of the disks in the raid system storing all the data (mostly the images) have started to [...]

Lightcurve of the week 211

25 January 2023|

This week we look at the light curve of LkHa137. This is a young star in the Pelican Nebula region. It is situated in a dark part of the molecular [...]

Lightcurve of the week 210

18 January 2023|

This week we have a look at some ongoing research -  something that will hopefully get published in the medium term future. In the past we have shown how to [...]

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