HOYS Citizen Science2021-11-23T16:02:51+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 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


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A HOYS participant perspective

23 November 2021|

Winning the picture competition By: Myles Gibson, Worthing Astronomers After winning the competition to produce a nice image from the HOYS data taken as part of the HOYS-LCO project, I [...]

Lightcurve of the week 149

18 November 2021|

This week we are looking again at a star that has recently been flagged up as variable by the Gaia photometric alerts. The object is called Gaia21uey, and also known [...]

Lightcurve of the week 148

10 November 2021|

While HOYS is aiming to investigate young stars, and thus focusses on imaging star forming regions and young clusters, it is obvious that there are other interesting objects in our [...]

Lightcurve of the week 147

3 November 2021|

This week we look back at another 'old(ish) friend' of this feature, and one of the HOYS auxiliary targets: The Gaia alert source Gaia19fct. Located quite far south (DEC=-10.5deg), it [...]

Lightcurve of the week 146

27 October 2021|

Frequently the data in our survey can be used to follow-up newly variable stars identified in data from the Gaia satellite - the so-called Gaia alerts. These objects are flagged [...]

Lightcurve of the week 145

21 October 2021|

This week we have another look at an object in the Orion Nebula (M42). We look at the star T-Ori, which is situated in the outskirts of M42 and known [...]

Lightcurve of the week 144

15 October 2021|

This week we look the the light curve of the young star AA Ori. It is situated in the southern part of the Orion Nebula (M42). It is known as [...]

Lightcurve of the week 143

7 October 2021|

This week we look at the light curve of the variable star V1598Cyg in the Pelican Nebula (IC5070). On the phase of it (see plot) it seems to be rather [...]

Lightcurve of the week 142

30 September 2021|

This weeks light curve is timely in two ways. First of all we are looking at the object Gaia21egu, (which is a known young star) that got flagged up as [...]

Lightcurve of the week 141

24 September 2021|

This week we look at the young star TX Ori. It is situated in the Sigma-Ori cluster, which is basically situated just to the south of the eastern belt star [...]

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 [...]

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