Английская Википедия:HD 134606
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end
HD 134606 is a yellow-hued star with a planetary system, positioned in the southern constellation of Apus. It is below the nominal limit for visibility with the naked eye, having an apparent visual magnitude of 6.86.[1] Based upon an annual parallax shift of Шаблон:Val, it is located 87.44 light-years away. The star appears to be moving further from the Earth with a heliocentric radial velocity of +1.9 km/s.[2]
This is an evolving G-type subgiant star with a stellar classification of G6 IV[3] and is not considered active, having a chromospheric activity index of −5.04.[4] It has about the same[5] mass as the Sun but is 25% more luminous.[1] The photosphere is radiating energy at an effective temperature of 5,614 K.[5] It has a higher than solar metallicity – a term astronomers use to describe the abundance of elements other than hydrogen and helium.[5]
There is a red dwarf companion star of spectral type M3V at a separation of ~1500 AU, designated L 72-1.[6][7]
Planetary system
The discovery of a planetary system orbiting HD 134606 was announced in 2011 following an eight-year survey carried out at the La Silla Observatory in Chile. The detection was made via the radial velocity method using the HARPS instrument. Applying a Keplerian fit to the data suggests the presence of three planets in moderately eccentric orbits.[8] None of the planetary orbits displays a mean motion resonance with the others.[9]
The system was updated by a 2024 study, which confirmed the three previously reported planets, though with a longer period for planet d, and detected two new ones. While all five planets are very likely to be real, the study advises caution regarding planet f due to the similarity of its period to the lunar cycle. The five planets range from super-Earth to super-Neptune mass, and the outermost, HD 134606 d, is a small gas giant orbiting within the habitable zone that may be a candidate for future space-based direct imaging missions. A long-period radial velocity trend was also detected, suggesting the presence of a distant sixth substellar companion of some kind.[7]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:OrbitboxPlanet Шаблон:OrbitboxPlanet Шаблон:OrbitboxPlanet Шаблон:OrbitboxPlanet Шаблон:Orbitbox end
References
- ↑ 1,0 1,1 Ошибка цитирования Неверный тег
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; для сносокAnderson2012
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; для сносокGaiaDR3
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; для сносокGray2006
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; для сносокJenkins2006
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; для сносокTsantaki2013
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; для сносокSIMBAD2
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; для сносокLi2024
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; для сносокMayor2011
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; для сносокGiuppone2013
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- Английская Википедия
- G-type subgiants
- Planetary systems with five confirmed planets
- Apus
- Durchmusterung objects
- Henry Draper Catalogue objects
- Hipparcos objects
- 2MASS objects
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