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天鵝座17，又名BD+33 3587，HD 187013、SAO 68827、HR 7534，是天鵝座的一颗恒星，视星等为4.99，位于銀經68.81，銀緯4.44，其B1900.0坐标为赤經19h 42m 37.8s，赤緯+33° 4.44′ 41″。
, 17 Cygni, som är stjärnans Flamsteed-betec … 17 Cygni, som är stjärnans Flamsteed-beteckning, är en dubbelstjärna belägen i den södra delen av stjärnbilden Svanen. Den har en lägsta skenbar magnitud på ca 5,00 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 47,8 mas, beräknas den befinna sig på ett avstånd på ca 68 ljusår (ca 21 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet av ca 4 km/s. Stjärnan har en relativt stor egenrörelse och förflyttar sig över himlavalvet med en hastighet av 0,451 bågsekunder per år. en hastighet av 0,451 bågsekunder per år.
, 17 Лебедя (17 Cygni) — двойная звёздная си … 17 Лебедя (17 Cygni) — двойная звёздная система в созвездии Лебедя. Имеет видимую звёздную величину +5,00, и, согласно шкале Бортля, видна в ночном пригородном небе. Измерения, проведённые спутником Hipparcos, показывают, что годовой сдвиг параллакса составляет 0,0478″, что эквивалентно расстоянию около 68,2 световых лет (20,9 пк) от Солнца. 17 Лебедя имеет относительно высокое собственное движение, проходя небесную сферу со скоростью 0,451″ в год. небесную сферу со скоростью 0,451″ в год.
, 17 Cygni é uma estrela dupla na direção da … 17 Cygni é uma estrela dupla na direção da constelação de Cygnus. Calcula-se sua idade em 2 bilhões e 800 milhões de anos. O sistema 17 Cygni tem 76% dos elementos pesados que há no sistema solar, e a origem deles é o componente B da estrela..A distância entre o Sol e 17 Cygni é de 68 anos-luz.a entre o Sol e 17 Cygni é de 68 anos-luz.
, 17 Cygni (17 Cyg / HD 187013 / HR 7534) es … 17 Cygni (17 Cyg / HD 187013 / HR 7534) es una estrella en la constelación del Cisne de magnitud aparente +4,99. Se encuentra a 68 años luz de distancia del Sistema Solar. 17 Cygni es una estrella blanca-amarilla de tipo espectral F7V con una temperatura superficial de 6379 K, unos 600 K más alta que la del Sol. De características semejantes a ι Piscium o Asellus Primus (θ Bootis), brilla con una luminosidad 3,6 veces mayor que la luminosidad solar. Su masa estimada es un 31% mayor que la del Sol y parece ser más joven que nuestra estrella, con una edad aproximada de 2000 millones de años. Su velocidad de rotación, 10 km/s, es 5 veces más rápida que la del Sol. Su metalicidad parece comparable a la solar; unas fuentes señalan un valor ligeramente superior ([Fe/H] = +0,03) pese a que otras apuntan un valor inferior ([Fe/H] = -0,13). Las abundancias relativas de elementos como sodio, magnesio y azufre están en torno al 70% de los valores solares, mientras que los contenidos de silicio o aluminio son muy semejantes a los encontrados en el Sol. 17 Cygni es uno de los objetivos prioritarios del Terrestrial Planet Finder (TPF) para la búsqueda de planetas terrestres que puedan albergar vida.netas terrestres que puedan albergar vida.
, 17 Cygni is the Flamsteed designation for … 17 Cygni is the Flamsteed designation for a multiple star system in the northern constellation of Cygnus. It has an apparent visual magnitude of 5.00, so, according to the Bortle scale, it is visible from suburban skies at night. Measurements of the annual parallax find a shift of 0.0477″, which is equivalent to a distance of around 68.5 ly (21.0 pc) from the Sun. It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.451″/year. This system consists of two visual binary systems that were discovered by John Herschel in the 1820s. Components A and B form a bright, wide pair with an angular separation of 26.0 arcsecond and an estimated orbital period of ~6,200 years. The faint, close system consists of components F and G with a separation of 2.6 arcsecond and a period of 238 years. The two binaries form a hierarchical system with a separation of about 800 arcseconds and orbital period of 3.7 million years or more. At an angular separation of 791.40 arcseconds is a proper motion companion with a classification of M0.4, indicating this is a red dwarf star. At the estimated distance of the pair, this is equal to a projected separation of 16,320 AU. Although the CCDM lists four other companions, these are not associated with the system. The stellar classification of the primary star, component A, is F7 V, which means it is a main sequence star like the Sun. The star has 1.24 times the mass of the Sun and 1.54 times the Sun's radius. It is some 2.8 billion years old and shines with 3.66 times the Sun's luminosity. The effective temperature of the stellar atmosphere is 6,455 K, giving it the yellow-white hued glow of an F-type star. yellow-white hued glow of an F-type star.
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17 Cygni (17 Cyg / HD 187013 / HR 7534) es … 17 Cygni (17 Cyg / HD 187013 / HR 7534) es una estrella en la constelación del Cisne de magnitud aparente +4,99. Se encuentra a 68 años luz de distancia del Sistema Solar. 17 Cygni es una estrella blanca-amarilla de tipo espectral F7V con una temperatura superficial de 6379 K, unos 600 K más alta que la del Sol. De características semejantes a ι Piscium o Asellus Primus (θ Bootis), brilla con una luminosidad 3,6 veces mayor que la luminosidad solar. Su masa estimada es un 31% mayor que la del Sol y parece ser más joven que nuestra estrella, con una edad aproximada de 2000 millones de años. Su velocidad de rotación, 10 km/s, es 5 veces más rápida que la del Sol./s, es 5 veces más rápida que la del Sol.
, 17 Cygni, som är stjärnans Flamsteed-betec … 17 Cygni, som är stjärnans Flamsteed-beteckning, är en dubbelstjärna belägen i den södra delen av stjärnbilden Svanen. Den har en lägsta skenbar magnitud på ca 5,00 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 47,8 mas, beräknas den befinna sig på ett avstånd på ca 68 ljusår (ca 21 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet av ca 4 km/s. Stjärnan har en relativt stor egenrörelse och förflyttar sig över himlavalvet med en hastighet av 0,451 bågsekunder per år. en hastighet av 0,451 bågsekunder per år.
, 天鵝座17，又名BD+33 3587，HD 187013、SAO 68827、HR 7534，是天鵝座的一颗恒星，视星等为4.99，位于銀經68.81，銀緯4.44，其B1900.0坐标为赤經19h 42m 37.8s，赤緯+33° 4.44′ 41″。
, 17 Cygni is the Flamsteed designation for … 17 Cygni is the Flamsteed designation for a multiple star system in the northern constellation of Cygnus. It has an apparent visual magnitude of 5.00, so, according to the Bortle scale, it is visible from suburban skies at night. Measurements of the annual parallax find a shift of 0.0477″, which is equivalent to a distance of around 68.5 ly (21.0 pc) from the Sun. It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.451″/year.lestial sphere at the rate of 0.451″/year.
, 17 Cygni é uma estrela dupla na direção da … 17 Cygni é uma estrela dupla na direção da constelação de Cygnus. Calcula-se sua idade em 2 bilhões e 800 milhões de anos. O sistema 17 Cygni tem 76% dos elementos pesados que há no sistema solar, e a origem deles é o componente B da estrela..A distância entre o Sol e 17 Cygni é de 68 anos-luz.a entre o Sol e 17 Cygni é de 68 anos-luz.
, 17 Лебедя (17 Cygni) — двойная звёздная си … 17 Лебедя (17 Cygni) — двойная звёздная система в созвездии Лебедя. Имеет видимую звёздную величину +5,00, и, согласно шкале Бортля, видна в ночном пригородном небе. Измерения, проведённые спутником Hipparcos, показывают, что годовой сдвиг параллакса составляет 0,0478″, что эквивалентно расстоянию около 68,2 световых лет (20,9 пк) от Солнца. 17 Лебедя имеет относительно высокое собственное движение, проходя небесную сферу со скоростью 0,451″ в год. небесную сферу со скоростью 0,451″ в год.
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17 Cygni
, 輦道五
, 17 Лебедя
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