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http://dbpedia.org/ontology/abstract HD 167665 é uma estrela na constelação de HD 167665 é uma estrela na constelação de Sagittarius. Com uma magnitude aparente visual de 6,40, está próxima do limite de visibilidade a olho nu. Com base em uma taxa de paralaxe de 32,01 mas (milissegundos de arco), determinada pela sonda Gaia, está localizada a aproximadamente 102 anos-luz (31,2 parsecs) da Terra. A estrela está se afastando do Sistema Solar com uma velocidade radial de +8 km/s, e possui um alto movimento próprio de 203 mas/a. Esta estrela tem um tipo espectral de F9V Fe−0.8 CH−0.4, o que indica que é uma estrela de classe F da sequência principal com um espectro que apresenta deficiência de ferro e da molécula CH em comparação a estrelas normais dessa temperatura. É uma estrela parecida com o Sol com uma massa 3% maior que a massa solar, mas tem um raio 32% maior que o solar. A estrela é mais velha que o Sol com uma idade estimada de 6,7 bilhões de anos, e está rotacionando com uma velocidade de rotação projetada de 5,2 km/s. HD 167665 está irradiando 2,45 vezes a luminosidade solar de sua fotosfera a uma temperatura efetiva de 6,080 K. Com base em grande variação na sua velocidade radial observada entre 1996 e 2006, uma possível anã marrom orbitando HD 167665 foi anunciada em 2007 pelo . Sua órbita tem um período de cerca de 12 anos, um semieixo maior de 5,61 UA uma excentricidade de 0,34. Esse objeto tem uma massa mínima de 51 vezes a massa de Júpiter, menor do que o limite de 80 massas de Júpiter para anãs marrons, mas ele pode também ser uma estrela de baixa massa se a inclinação orbital for suficientemente baixa. Os dados astrométricos da sonda Hipparcos não conseguiram impor um limite máximo significativo para a massa do objeto. Anãs marrons orbitando estrelas parecidas com o Sol são extremamente raras, com uma taxa de ocorrência inferior a 0,6%.om uma taxa de ocorrência inferior a 0,6%. , HD 167665 är en ensam stjärna belägen i deHD 167665 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Skytten. Den har en skenbar magnitud av ca 6,39 och kräver åtminstone en handkikare för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 32,6 mas, beräknas den befinna sig på ett avstånd på ca 100 ljusår (ca 31 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 8 km/s.eliocentrisk radialhastighet på ca 8 km/s. , HD 167665 is a yellow-white hued star withHD 167665 is a yellow-white hued star with a brown dwarf companion in the southern constellation of Sagittarius. With an apparent visual magnitude of 6.39, it is near the lower brightness limit for stars that are visible to the naked eye. Based upon an annual parallax shift of 32.4 mas as seen from Earth, it is located 101 light years from the Sun. The star is moving away from the Sun with a radial velocity of +8 km/s. This star has a stellar classification of F9V Fe−0.8 CH−0.4, which indicates this is an F-type main-sequence star with a spectrum that displays mild underabundances of iron and the CH molecule compared to normal stars of this temperature. It is a solar-type star with about the same mass as the Sun, but has a radius 32% greater. The star is older than the Sun with an estimated age of 6.7 billion years, and it is spinning with a projected rotational velocity of 8 km/s. HD 167665 is radiating 2.45 times the Sun's luminosity from its photosphere at an effective temperature of 6,080 K. Based upon regular variations in radial velocity observed between 1996 and 2006, an orbiting companion was announced by the California and Carnegie Planet Search (CCPS) program in 2007. This perturbing object, designated HD 167665 b, has an orbital period of twelve years with an eccentricity of 0.342. The semimajor axis of this orbit is 5.62 AU and the object has a mass of at least 50.3±0.4 MJ. Since the inclination of the orbit was initially unknown, the exact mass could not be determined, with a 79% chance that the mass of the object constrains it to be a brown dwarf with a mass less than 82 MJ. In 2022, astrometric observations confirmed this object to be a brown dwarf, with a true mass of 52.708+5.112−4.403 MJ. Its inclination suggests a non-zero probability that it transits its star.ero probability that it transits its star. , HD 167665,又名CD-2814408,SAO 186593、HR 6836,是一颗恒星,视星等为6.4,位于銀經4.01,銀緯-5.74,其B1900.0坐标为赤經18h 11m 3.4s,赤緯-28° -5.74′ 10″。
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rdfs:comment HD 167665 é uma estrela na constelação de HD 167665 é uma estrela na constelação de Sagittarius. Com uma magnitude aparente visual de 6,40, está próxima do limite de visibilidade a olho nu. Com base em uma taxa de paralaxe de 32,01 mas (milissegundos de arco), determinada pela sonda Gaia, está localizada a aproximadamente 102 anos-luz (31,2 parsecs) da Terra. A estrela está se afastando do Sistema Solar com uma velocidade radial de +8 km/s, e possui um alto movimento próprio de 203 mas/a.ui um alto movimento próprio de 203 mas/a. , HD 167665 är en ensam stjärna belägen i deHD 167665 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Skytten. Den har en skenbar magnitud av ca 6,39 och kräver åtminstone en handkikare för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 32,6 mas, beräknas den befinna sig på ett avstånd på ca 100 ljusår (ca 31 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 8 km/s.eliocentrisk radialhastighet på ca 8 km/s. , HD 167665,又名CD-2814408,SAO 186593、HR 6836,是一颗恒星,视星等为6.4,位于銀經4.01,銀緯-5.74,其B1900.0坐标为赤經18h 11m 3.4s,赤緯-28° -5.74′ 10″。 , HD 167665 is a yellow-white hued star withHD 167665 is a yellow-white hued star with a brown dwarf companion in the southern constellation of Sagittarius. With an apparent visual magnitude of 6.39, it is near the lower brightness limit for stars that are visible to the naked eye. Based upon an annual parallax shift of 32.4 mas as seen from Earth, it is located 101 light years from the Sun. The star is moving away from the Sun with a radial velocity of +8 km/s.the Sun with a radial velocity of +8 km/s.
rdfs:label HD 167665
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