NGC 5634

NGC 5634
The globular cluster NGC 5634 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Class	IV [1]
Constellation	Virgo
Right ascension	14^h 29^m 37.28^s[2]
Declination	−05° 58′ 35.1″[2]
Distance	81.9 ± 3.8 kly (25.12 ± 1.16 kpc)[3]
Apparent magnitude (V)	10.05[2]
Physical characteristics
Radius	2.45' x 2.45'[4]
Metallicity	[Fe/H] = −1.8 ± 0.1[3] dex
Estimated age	12.8 ± 0.3 Gyr[3]
Other designations	GCl 28, GCRV 8456[2]
See also: Globular cluster, List of globular clusters

NGC 5634 is a globular cluster in the constellation Virgo, located about 82,000 light years (25.12 kiloparsecs) from Earth.^[2] NGC 5634 has an apparent magnitude of about 10^[2] and a diameter of 4 or 5 arcminutes.^[4] Its Shapley–Sawyer Concentration Class is IV,^[1] meaning the cluster shows intermediate rich concentrations. The star near the upper right is the eleventh-magnitude UCAC2 29844847. There is also a bright orange giant, HD 127119, about 1.3 arcminutes away from the cluster.

The origin of NGC 5634 is somewhat unclear; it was once thought to be a likely member of the Sagittarius Dwarf Spheroidal Galaxy,^[4] but it may be associated with Gaia-Sausage-Enceladus or the Helmi stream instead.^[3]

References

1. Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin, 849 (849): 11–14, Bibcode:1927BHarO.849...11S.
2. "NGC 5634". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 28, 2020.
3. Wang 王, Shouzhi 守智; Nie 聂, Jundan 俊丹; Jiang 姜, Biwei 碧沩; Tian 田, Hao 浩.; Liu 刘, Chao 超.; Zhang 张, Ying-Hua 颖华 (2025). "The Structural and Kinematical Properties of NGC 5634, a Globular Cluster Associated with the Sagittarius Dwarf Galaxy?". The Astrophysical Journal. 988 (1): 39. arXiv:2506.04806. Bibcode:2025ApJ...988...39W. doi:10.3847/1538-4357/ade0b6.
4. "spider.seds.org NGC 5634". Retrieved 7 January 2016.

External links

• Media related to NGC 5634 at Wikimedia Commons
• NGC 5634