NGC 6284 explained

NGC 6284 is a globular cluster located in the constellation Ophiuchus. It is designated as IX in the galaxy morphological classification scheme and was discovered by the German-born British astronomer William Herschel on 22 May 1784. Its distance had previously been estimated at 49,900 light years from Earth,^{[5] [6] [7] [8] [9]} but this was revised in 2023 to around 43,000 light years.^[10] This same study, based on high-resolution Hubble Space Telescope optical observations, produced the first high-quality colour-magnitude diagram (CMD) of NGC 6284, extending down to about six magnitudes below its main sequence turn-off. The new observations moved its centre of gravity by 1.5–3 arcseconds from previous values, and its density profile showed a steep central cusp, suggesting that NGC 6284 is a post-core collapse (PCC) cluster.

The nearby metal-poor star may be a recent runaway from NGC 6284.

See also

• List of NGC objects (6001–7000)
• List of NGC objects

Notes and References

1. NGC 6284.
2. Web site: Globular cluster NGC 6284 inspected by astronomers .
3. Web site: Globular cluster NGC 6284 inspected by astronomers .
4. Web site: Catalog of Parameters for Milky Way Globular Clusters. William E. Harris. 3 February 2017.
5. Web site: Object No. 1 - NGC 6284. NASA/IPAC extragalactic database. NASA/IPAC. 3 October 2015.
6. Web site: Revised NGC Data for NGC 6284. Seds. 3 October 2015.
7. Web site: NGC 6284 (= GCL 53). cseligman. 3 October 2015.
8. Web site: NGC 6284. Seds. 3 October 2015.
9. Web site: The globular cluster NGC 6284. In-the-sky. 3 October 2015.
10. Web site: Globular cluster NGC 6284 inspected by astronomers .