HOYS Citizen Science2024-04-16T12:47:53+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 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 274

11 April 2024|

This week we look at the new Gaia alert Gaia24beh. It was published yesterday (April 10, 2024) and the source is situated in the Pelican Nebula target region of [...]

HOYS-LCO4 Picture Competition

8 April 2024|

Our teacher training program HOYS-LCO4 is slowly coming to an end. This year 15 teachers with almost 230 pupils from 8 countries signed up to learn how to observe with [...]

Lightcurve of the week 273

4 April 2024|

This week we have a look at the newly published (~3weeks ago) Gaia alert source Gaia24ayj. The object is situated just North of the Orion Nebula and known as [...]

Lightcurve of the week 272

28 March 2024|

Two weeks ago we looked at the new Gaia alert source Gaia24avc, which was situated in the Elephant Trunk Nebula region. On the same date the alert source Gaia24avb [...]

Lightcurve of the week 271

20 March 2024|

This week we show a plot (Fig.5) from our latest paper using HOYS data, that got accepted last week: A survey for variable young stars with small telescopes: IX [...]

Lightcurve of the week 270

14 March 2024|

This week we have a timely look at a newly identified Gaia variable named Gaia24avc. It is situated in the Elephant Trunk Nebula region. It was identified 11 days [...]

Lightcurve of the week 269

5 March 2024|

This week we look at the light curve of an 'old friend' of the project. The young star V350Cep , situated in the NGC7129 cluster. It is a known young [...]

Lightcurve of the week 268

28 February 2024|

When you do a survey (like HOYS), one of the things you tend to find are things you did not expect. Well, here is one. One of our students [...]

Lightcurve of the week 267

21 February 2024|

Since we are slowly nearing 110 thousand images in our database and will celebrate our 10th anniversary in the autumn, we want to use this week for a general [...]

Lightcurve of the week 266

15 February 2024|

This week we have a timely look at the new Gaia alert source Gaia24ala. It has been flagged up as it showed a 1mag dimming event over a short [...]

Lightcurve of the week 265

6 February 2024|

Pat Devine tells us how to automate the preparation of Seestar files ready for upload to the HOYS server, including python scripts.

Lightcurve of the week 264

1 February 2024|

This week the 8th paper in our series "A survey for variable young stars with small telescopes:" has been accepted for publication. You can find the link to the [...]

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