VX Sagittarii [SEP] constellation
VX Sagittarii
VX Sagittarii is a red supergiant or red hypergiant located more than 1.5 kiloparsec away from the Sun in the constellation of Sagittarius. It is a pulsating variable star with an unusually large magnitude range. It is also one of the largest stars discovered so far, with a radius varying between .
Observations.
The star is classed as a cool semiregular variable of type SRc with a pulsational period of 732 days. The variations sometimes have an amplitude comparable to a long period variable, at other times they are
of well-known naked-eye examples:
- Alpha Herculis (=Rasalgethi)
- Psi1 Aurigae
- 119 Tauri
- Antares
- Betelgeuse
Other examples have become known on account of their enormous size, more than :
- KW Sagittarii
- PZ Cassiopeiae
- VX Sagittarii
- KY Cygni
- V354 Cephei
- Mu Cephei
- VV Cephei A
External links.
- Red Supergiant Stars