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Mimosa (Beta Crucis)
The second brightest star of in the constellation Crux; its relatively modern name, which comes from the Latin for “actor” (and is also a word used in botany), is of unknown origin. Mimosa is a hot giant B star and also a binary whose components are only about 8 AU apart – too close to resolve – and have an orbital period of 5 years. Mimosa is also a multiply-periodic Beta Cephei star that varies between magnitudes 1.23 and 1.31 with periods of 5.68, 3.87, and 2.91 hours.
| Visual magnitude | 1.25 |
| Absolute magnitude | -3.92 |
| Spectral type | B0.5III |
| Surface temperature | 27,600 K |
| Luminosity | 34,000 Lsun |
| Mass | 14 Msun |
| Distance | 353 light-years |
| Position | R.A. 12h 47m 43.2s, Dec. -59° 41' 19" |
Related entry
• brightest stars
Related category
• NOTABLE STARS
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