Английская Википедия:Iota Mensae
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end Iota Mensae is a single star about Шаблон:Val away in the faint constellation Mensa. It has a very slightly variable apparent magnitude of 6.0, making it visible with the naked eye under good skies.
Iota Mensae has a spectral type of B8III, indicating that it has exhausted hydrogen at its core and expanded away from the main sequence. It is about 3.6 times the mass (Шаблон:Solar mass), 301 times as luminous, and has swollen to 9.5 times the radius of the Sun (Шаблон:Solar radius). It is calculated to be 314 million years old.
It has been catalogued as a chemically peculiar star with abnormally strong lines of silicon in its spectrum but this classification is now considered doubtful.[1] Its brightness varies by a few hundredths of a magnitude. Its period was initially measured at 2.6 days,[2] but this is now considered to be a period of 5.3 days with primary and secondary minima of a similar depth. The variability is thought to be due to the rotation of the star.[3]
References
- Английская Википедия
- Mensa (constellation)
- Bayer objects
- Hipparcos objects
- Bright Star Catalogue objects
- Henry Draper Catalogue objects
- B-type giants
- Rotating ellipsoidal variables
- Durchmusterung objects
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