# NGC 6633

> open cluster

**Wikidata**: [Q1146799](https://www.wikidata.org/wiki/Q1146799)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/NGC_6633)  
**Source**: https://4ort.xyz/entity/ngc-6633


## References

1. SIMBAD
2. VizieR
3. [Source](http://messier.seds.org/xtra/ngc/n6633.html)
4. On Structural Properties of Open Galactic Clusters and their Spatial Distribution. Catalog of Open Galactic Clusters
5. A Catalogue of Star Clusters shown on Franklin-Adams Chart Plates
6. Freebase Data Dumps. 2013
7. Gaia Data Release 2. Observational Hertzsprung-Russell diagrams
8. The Gaia-ESO Survey: The N/O abundance ratio in the Milky Way
9. Astrophysical parameters of Galactic open clusters
10. X-ray source populations in the region of the open clusters NGC 6633 and IC 4756