Alicante 7

Alicante 7, also known as RSGC5, (Red Supergiant Cluster 5) is an open cluster rich in red supergiants found in the Scutum-Crux Arm of the Milky Way Galaxy, along with RSGC1, Stephenson 2, RSGC3, Alicante 8, and Alicante 10.^[2] Alicante 7 contains 7 red supergiants, making it one of the most massive open clusters known.^[3]

Alicante 7
Observation data (J2000 epoch)
Right ascension	18h 44m 29.45s[1]
Declination	−03° 30′ 02.4″[1]
Distance	19.6 kly (6 kpc[2])
Apparent magnitude (V)	not visible
Apparent dimensions (V)	~7′[2]
Physical characteristics
Mass	~10000[2] M☉
Radius	~6 pc[a]
Estimated age	16–20 myr
Other designations	RSGC5
Associations
Constellation	Scutum
See also: Open cluster, List of open clusters

Notes

1. The radius of Alicante 7 can be calculated using the angular size and the distance