NGC 6558 (other designations - GCL 89 , ESO 456-SC62 ) is a globular cluster located at a distance of about 24,000 light-years from Earth in the constellation Sagittarius . The cluster was discovered in 1784 by astronomer William Herschel using an 18.7-inch telescope.
| NGC 6558 | |
|---|---|
| Star cluster | |
 | |
| Research history | |
| Discoverer | John Herschel |
| opening date | August 3, 1834 |
| Designations | NGC 6558 , GCL 89 , ESO 456-SC62 |
| Observational data ( Age J2000.0 ) | |
| Type of | Globular cluster |
| Right ascension | |
| Declination | |
| Visible magnitude (V) | 11.29 |
| Visible Dimensions (V) | 4,2 ' |
| Constellation | Sagittarius |
This object is one of those listed in the original edition of the New General Catalog .
Literature
- Robert Michael Rich, Sergio Ortolani, E. Bica, Beatriz Barbuy. VI Photometry of the Post-Core-Collapse Globular Cluster NGC 6558 and the Adjacent Bulge Field Population : [ eng. ] // The Astronomical Journal. - 1998. - Vol. 116, no. 3 .-- P. 1295.
- Beatriz Barbuy, Manuela Zoccali, Sergio Ortolani, Dante Minniti, Vanessa Hill, Alvio Renzini, E. Bica, Ana Gómez. NGC 6558: A Blue Horizontal Branch Moderately Metal-Poor Globular Cluster in the Bulge : [ eng. ] // The Astronomical Journal. - 2007. - Vol. 134, No. 4. - P. 1613.
- Martha L. Hazen. A Search for Variable Stars in the Globular Clusters NGC 5694 and NGC 6558 : [ eng. ] // The Astronomical Journal. - 1996. - Vol. 111. - P. 1184.
See also
- List of Messier objects
- New shared directory
Links
- Information in English and French from the original “ New General Catalog ”
- Information (Eng.) From the Revised New General Catalog
- SIMBAD
- VizieR (English)
- NASA / IPAC Extragalactic Database
- List of NGC 6558 publications