HOYS Citizen Science2021-05-12T22:56:52+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.
To get involved and apply FIND OUT MORE »

0 images
uploaded to server
0 magnitudes
measured in images


Lightcurve of the week 122

11 May 2021|

This week we are looking again at a southern hemisphere target. The object is known as 2MASS08294005-4146097. Not much is known about the source, but it is listed as a [...]

Lightcurve of the week 121

7 May 2021|

For this week we keep with the theme of giant stars and return to our auxiliary HOYS data set from the Cygnus Project. The phase folded light curve shown is [...]

Lightcurve of the week 120

30 April 2021|

This week we have a look at another Mira type variable star. It is the star V809Ori in our Lambda-Ori target field. The object is clearly a background star, but [...]

A HOYS participant perspective

22 April 2021|

50 talks about HOYS to amateur astronomy societies By: Dirk Froebrich, PI of the HOYS Project Last night I gave the 50th talk about the HOYS project. This one was [...]

Lightcurve of the week 119

19 April 2021|

This week we have a look at a long term variable star in the P Cyg target field of HOYS. The star in question is V434Cyg, which is classified as [...]

Lightcurve of the week 118

15 April 2021|

The HOYS winter target that is visible the longest each spring is NGC2264 (The Christmas Tree Cluster). Within it there is a large variety of young and variable stars. Amongst [...]

Lightcurve of the week 117

8 April 2021|

This week we look at the star BE Ori, in our L1641N target field. This is one of our most southern fields in Orion and has now set for the [...]

Lightcurve of the week 116

1 April 2021|

This week's featured light curve is not a young star. Instead we are looking at the Mira type variable, KS Cyg.  These type of stars are pulsating giants with periods [...]

Lightcurve of the week 115

24 March 2021|

This week we have a timely look at one of the Gaia photometric alerts. In particular Gaia21bkd, which was published in the evening of March 18. The Gaia light curve [...]

Lightcurve of the week 114

17 March 2021|

This week we revisit one of the old friends of the light curve of the week feature. The star 2MASS J21383981+5708470 projected onto the target region IC1396A (the Elephant Trunk [...]

Lightcurve of the week 113

11 March 2021|

This week we have another look at one of the stars from the auxiliary dataset. It is of the star 2MASS J21083418+4656198. There is not much known about the star [...]

Lightcurve of the week 112

5 March 2021|

This weeks light curve is from our auxiliary dataset, introduced as part of our 100th light curve of the week video. This is a huge set of data taken as [...]

Go to Top