Alicante 7
Open cluster rich in red supergiants in the constellation Scutum
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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 |
Notes
- The radius of Alicante 7 can be calculated using the angular size and the distance
