Английская Википедия:91 Aquarii
Шаблон:Short description Шаблон:Redirect 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 91 Aquarii is the Flamsteed designation for a triple star[1] system in the equatorial constellation of Aquarius. It also bears the Bayer designation Psi1 Aquarii (Шаблон:Bayer-blank, Шаблон:Bayer-blank). It is visible to the naked eye with an apparent visual magnitude of +4.248.[2] Parallax measurements yield an estimated distance of around Шаблон:Convert from Earth.[3] An extrasolar planet is known to orbit the main star.
Stellar system
91 Aquarii is a triple star system.[1] The primary component, 91 Aqr A, is a giant star with a stellar classification of K1 III.[4] This is an evolved star with 138% of the Sun's mass that has expanded to over 10 times the size of the Sun.[4] It is radiating 54[4] times the Sun's luminosity from its outer envelope at an effective temperature of 4,730 K.[4] This gives it the orange-hued glow of a K-type star.[5]
The primary shares a common proper motion with two others stars, 91 Aqr B and C, suggesting that they are physically connected.[6] The latter pair form a binary system located at an angular separation of 52 arcseconds from the primary.[7] They are 10th magnitude stars separated by 0.3 arcseconds from each other.
| Component | Apparent magnitude (V) | Spectral type |
|---|---|---|
| A | 4.22 | K0 III |
| B | 9.62 | K3 V |
| C | 10.10 |
Because it lies near the same line of sight, the binary star system CCDM J23159-0905DE was listed to belong to the 91 Aquarii system according to the CCDM catalogue.[8] However, it is listed as physically unconnected in the WDS catalogue[9] and the pair have a different proper motion than 91 Aquarii.[6] CCDM J23159-0905DE has two components, the 13th magnitude CCDM J23159-0905D 80.4 arcseconds from 91 Aquarii, and the 14th magnitude CCDM J23159-0905E 19.7 arcseconds from 91 Aquarii.
Planetary system
In 2003, the discovery of an extrasolar planet orbiting 91 Aquarii A was announced,[10] but its confirmation was not formally published until 2013.[11]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
See also
References
External links
- Шаблон:Cite simbad
- Шаблон:Cite simbad
- Шаблон:Cite simbad
- Extrasolar Planets Encyclopaedia: 91 Aqr
- Orbit simulation
- Image Psi Aquarii
- sky-map.org/
- planetquest.jpl.nasa.gov
- ↑ 1,0 1,1 Ошибка цитирования Неверный тег
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- ↑ https://web.archive.org/web/20090131051103/http://ad.usno.navy.mil/wds/Webtextfiles/wdsnewframe4.html
- ↑ Ошибка цитирования Неверный тег
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- Английская Википедия
- Aquarius (constellation)
- Bayer objects
- Flamsteed objects
- Henry Draper Catalogue objects
- Bright Star Catalogue objects
- Hipparcos objects
- Planetary systems with one confirmed planet
- K-type giants
- Triple star systems
- Multi-star planetary systems
- Durchmusterung objects
- Gliese and GJ objects
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