Английская Википедия:HR 4177
Шаблон:Short description Шаблон:About Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:End
HR 4177, also called t2 Carinae (t2 Car), is a double star[1] in the southern constellation of Carina. It is faintly visible to the naked eye with a combined apparent visual magnitude of +4.77.[1] The two components are HD 92397 and HD 92398. The primary component is located at a distance of approximately 1,600 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +11 km/s.[2] It has a peculiar velocity of Шаблон:Val and may be a runaway star.[3] The star is a member of the BH 99 cluster.[4]
The magnitude 4.85[1] primary, component A, is a massive K-type supergiant or bright giant with a stellar classification of K4.5Ib-II.[2] Houk (1978) instead listed it with a class of K4/5III: but with some uncertainty about the classification.[5] It has 12[3] times the mass of the Sun and has expanded to 202[6] times the Sun's radius. The star is radiating 8,478[6] times the luminosity of the Sun from its bloated photosphere at an effective temperature of 3,900 K.[6]
The magnitude 7.48 companion star, component B, was discovered by J. Dunlop in 1829. As of 2015, it was located at an angular separation of Шаблон:Val along a position angle of 21°, relative to the primary.[7] It is a B-type giant/bright giant star with a class of B9II/III.[2] The pair show a common proper motion and roughly similar parallax measurements,[6] but it remains unclear whether they form a gravitationally-bound pair.[1]
References
Шаблон:Stars of Carina Шаблон:Sky
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- Английская Википедия
- Double stars
- K-type supergiants
- B-type bright giants
- Carina (constellation)
- Bayer objects
- Durchmusterung objects
- Henry Draper Catalogue objects
- Hipparcos objects
- Bright Star Catalogue objects
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- Википедия
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