# Messier 39

> open cluster in the constellation Cygnus

**Wikidata**: [Q13883](https://www.wikidata.org/wiki/Q13883)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Messier_39)  
**Source**: https://4ort.xyz/entity/messier-39


## References

1. SIMBAD
2. VizieR
3. On Structural Properties of Open Galactic Clusters and their Spatial Distribution. Catalog of Open Galactic Clusters
4. A Catalogue of Star Clusters shown on Franklin-Adams Chart Plates
5. [Messier 39](http://messier.seds.org/m/m039.html)
6. Freebase Data Dumps. 2013
7. Gaia Data Release 2. Observational Hertzsprung-Russell diagrams
8. A RAVE investigation on Galactic open clusters
9. On the metallicity of open clusters
10. Astrophysical parameters of Galactic open clusters
11. The orbits of open clusters in the Galaxy
12. Proper motions of the optically visible open clusters based on the UCAC4 catalog