# NGC 6558

> Globular cluster in the constellation Sagittarius

**Wikidata**: [Q1146456](https://www.wikidata.org/wiki/Q1146456)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/NGC_6558)  
**Source**: https://4ort.xyz/entity/ngc-6558


## References

1. SIMBAD
2. Uniting old stellar systems: from globular clusters to giant ellipticals
3. G2C2 – I. Homogeneous photometry for Galactic globular clusters in SDSS passbands
4. A catalog of parameters for globular clusters in the Milky Way
5. Insights into pre-enrichment of star clusters and self-enrichment of dwarf galaxies from their intrinsic metallicity dispersions
6. RR Lyrae-based calibration of the Globular Cluster Luminosity Function
7. Proper motions and kinematics of selected bulge globular clusters