Alicante 7

Alicante 7
Observation data (J2000 epoch)
Right ascension	18^h 44^m 29.45^s[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

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]

Notes

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

References

1. "Cl Alicante 7". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-10-05.
2. Negueruela, I.; González-Fernández, C.; Marco, A.; Clark, J. S. (1 April 2011). "A massive association around the obscured open cluster RSGC3". Astronomy & Astrophysics. 528: A59. arXiv:1102.0028. Bibcode:2011A&A...528A..59N. doi:10.1051/0004-6361/201016102. S2CID 53517711.
3. Origlia, L.; Dalessandro, E.; Sanna, N.; Mucciarelli, A.; Oliva, E.; Cescutti, G.; Rainer, M.; Bragaglia, A.; Bono, G. (2019). "Stellar population astrophysics (SPA) with the TNG". Astronomy & Astrophysics. 629: A117. arXiv:1908.07779. doi:10.1051/0004-6361/201936283. S2CID 201125229.