Английская Википедия:Gliese 649
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
Gliese 649 is a small star with an orbiting exoplanet in the constellation Hercules. It has an apparent visual magnitude of 9.7,[1] which is too faint to be seen with the naked eye. The system is located at a distance of 33.9 light years based on parallax, and is drifting further away with a radial velocity of 3.8 km/s.[2]
This is an M-type main-sequence star, a red dwarf, with a stellar classification of M1.0V.[1] It has 52% of the mass of the Sun and 53% of the Sun's girth. In the visible light band, the star is radiating 4.4% of the luminosity of the Sun from its photosphere at an effective temperature of 3,621 K.[3] It is spinning slowly with a rotation period of 24.9 days.[1]
Planetary system
A Saturn-mass planet was detected around the red dwarf star by J. A. Johnson and associates in 2010.[4] It has a minimum mass 32.8% of Jupiter's mass and is located 1.15 astronomical units from its star in eccentric orbit (e=0.3). Assuming a luminosity of 4.5% that of the Sun, the habitable zone is located at Шаблон:Val, thus the planet should be as cold as if it were located at Шаблон:Val from a Solar-like star. Also accounting for different periastron and apastron positions of 0.8 and Шаблон:Val respectively, the planet could likely show seasonal temperature changes.
Debris disk
Using results from the Herschel Space Observatory survey of 21 late-type stars carried out in 2010, a debris disk was discovered between approximately 6 and Шаблон:Val. The disk was not detected at 22µm by NASA's Wide-field Infrared Survey Explorer so therefore it is likely to be below 100 Kelvin and similar to the Kuiper belt. The disk was marginally resolved, appearing very asymmetric, and so is probably consistent with being closer to edge-on, rather than face-on, in its inclination.[5]
Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:OrbitboxPlanet disk Шаблон:Orbitbox end
References
See also
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
<ref>
; для сносокPinamonti2023
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокGaiaDR3
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокPineda2021
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокJohnson2010
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокKennedy2018
не указан текст
- Английская Википедия
- M-type main-sequence stars
- Planetary systems with one confirmed planet
- Circumstellar disks
- Hercules (constellation)
- Durchmusterung objects
- Gliese and GJ objects
- Hipparcos objects
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
- Страницы с ошибками в примечаниях