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About: HR 6806

An Entity of Type: star, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

HR 6806 is a solitary, orange, main sequence, and Sun-like (K2 V) star located thirty-six light-years away, in the constellation Hercules. The star is smaller than the Sun, with around 79% of the solar mass and radius, and 35% of the solar luminosity. It appears to be rotating slowly with an estimated period of 42 days. In 1988, it was noticed that the star had an inactive chromosphere, with a surface magnetic field strength of only 1,500 G. From 1990 activity in the chromosphere increased, inline with a 16 year stellar cycle previously observed. But, sometime after 1994 (exact date unknown because of a data collection gap between 1995 and 2004) chromospheric activity greatly reduced, and has stayed flat for more than 16 years. As of 2022, the star appears to have entered the equivalent of

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dbo:abstract
  • HR 6806 je hvězda spektrálního typu K2, vzdálená od Země 36,0 ly. Jedná se o oranžového trpaslíka, který se nachází v souhvězdí Herkula. Radiální rychlost hvězdy činí přibližně 19,5 km/s. (cs)
  • HR 6806 (HD 166620 / HIP 88972 / GJ 706)​ es una estrella de magnitud aparente +6,37. Se localiza en la constelación de Hércules 3º al noroeste de θ Herculis.Se encuentra a 36,2 años luz del Sistema Solar, siendo , a poco más de un año luz, la estrella más próxima a HR 6806.​ HR 6806 es una enana naranja de tipo espectral K2V con una temperatura efectiva de 5019 K.Su luminosidad corresponde al 35% de la que tiene el Sol y tiene un diámetro igual al 79% del diámetro solar.En cuanto a su metalicidad —abundancia relativa de elementos más pesados que el helio—, parece ser menor que la solar; diversos estudios señalan una abundancia relativa de hierro equivalente al 66% de la existente en el Sol,​ tendencia también observada en elementos como níquel, silicio y sodio.​ La masa de HR 6806 es de aproximadamente 2/3 de la masa solar.Su edad, teniendo en cuenta parámetros cromosféricos, es de 4750 - 5000 millones de años,​​ no muy distinta de la estimada por girocronología —basada en su período de rotación de 42,4 días—, que es de 5300 millones de años.​ (es)
  • HR 6806 is a solitary, orange, main sequence, and Sun-like (K2 V) star located thirty-six light-years away, in the constellation Hercules. The star is smaller than the Sun, with around 79% of the solar mass and radius, and 35% of the solar luminosity. It appears to be rotating slowly with an estimated period of 42 days. In 1988, it was noticed that the star had an inactive chromosphere, with a surface magnetic field strength of only 1,500 G. From 1990 activity in the chromosphere increased, inline with a 16 year stellar cycle previously observed. But, sometime after 1994 (exact date unknown because of a data collection gap between 1995 and 2004) chromospheric activity greatly reduced, and has stayed flat for more than 16 years. As of 2022, the star appears to have entered the equivalent of a Maunder minimum. The star is around six billion years of age. There was suspected to be a nearby very cool, and very dim, T9 to Y brown dwarf companion, WISE J180901.07+383805.4, at an angular separation of 769″, which would have corresponded to a projected separation of 8460 AU at the distance of HR 6806. However, with further observation it was found to be bluer than at first thought and more typical of a slightly brighter T7 dwarf, which would place it at a much greater distance of 91 ly (28 pc)—ruling out a physical association. This is confirmed by the differing proper motion of the star and this object. (en)
  • HR 6806은 분광형 K2V의 주계열성으로 단독성이자 오렌지색 왜성이며, 지구에서 허큘리스자리 방향으로 36광년 떨어져 있다. (ko)
  • HR 6806 is een oranje dwerg met een spectraalklasse van K2.V. De ster bevindt zich 36,19 lichtjaar van de zon. (nl)
  • HD 166620 ( eller HR 6806) är en ensam stjärna i det mellersta området av stjärnbilden Herkules. Den har en skenbar magnitud av ca 6,40 och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 90,1 mas, beräknas den befinna sig på ett avstånd på ca 36 ljusår (ca 11 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -19 km/s. (sv)
  • HD 166620,又名BD+38 3095,SAO 66700、HR 6806,是一颗恒星,视星等为6.4,位于銀經65.34,銀緯24.21,其B1900.0坐标为赤經18h 6m 18.7s,赤緯+38° 24.21′ 5″。 (zh)
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  • +0.875 (en)
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  • K2 V (en)
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  • January 2018 (en)
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  • J2000 (en)
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  • yes (en)
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  • ARICNS: 01473 (en)
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  • 0.350000 (xsd:double)
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  • −0.61 (en)
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  • 0.020000 (xsd:double)
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  • 90.126400 (xsd:double)
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  • −468.214 (en)
dbp:propMoRa
  • −316.520 (en)
dbp:rotation
  • 3628800.0 (dbd:second)
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  • 4900 (xsd:integer)
dbp:uB
  • +0.585 (en)
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rdfs:comment
  • HR 6806 je hvězda spektrálního typu K2, vzdálená od Země 36,0 ly. Jedná se o oranžového trpaslíka, který se nachází v souhvězdí Herkula. Radiální rychlost hvězdy činí přibližně 19,5 km/s. (cs)
  • HR 6806은 분광형 K2V의 주계열성으로 단독성이자 오렌지색 왜성이며, 지구에서 허큘리스자리 방향으로 36광년 떨어져 있다. (ko)
  • HR 6806 is een oranje dwerg met een spectraalklasse van K2.V. De ster bevindt zich 36,19 lichtjaar van de zon. (nl)
  • HD 166620 ( eller HR 6806) är en ensam stjärna i det mellersta området av stjärnbilden Herkules. Den har en skenbar magnitud av ca 6,40 och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 90,1 mas, beräknas den befinna sig på ett avstånd på ca 36 ljusår (ca 11 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -19 km/s. (sv)
  • HD 166620,又名BD+38 3095,SAO 66700、HR 6806,是一颗恒星,视星等为6.4,位于銀經65.34,銀緯24.21,其B1900.0坐标为赤經18h 6m 18.7s,赤緯+38° 24.21′ 5″。 (zh)
  • HR 6806 is a solitary, orange, main sequence, and Sun-like (K2 V) star located thirty-six light-years away, in the constellation Hercules. The star is smaller than the Sun, with around 79% of the solar mass and radius, and 35% of the solar luminosity. It appears to be rotating slowly with an estimated period of 42 days. In 1988, it was noticed that the star had an inactive chromosphere, with a surface magnetic field strength of only 1,500 G. From 1990 activity in the chromosphere increased, inline with a 16 year stellar cycle previously observed. But, sometime after 1994 (exact date unknown because of a data collection gap between 1995 and 2004) chromospheric activity greatly reduced, and has stayed flat for more than 16 years. As of 2022, the star appears to have entered the equivalent of (en)
  • HR 6806 (HD 166620 / HIP 88972 / GJ 706)​ es una estrella de magnitud aparente +6,37. Se localiza en la constelación de Hércules 3º al noroeste de θ Herculis.Se encuentra a 36,2 años luz del Sistema Solar, siendo , a poco más de un año luz, la estrella más próxima a HR 6806.​ La masa de HR 6806 es de aproximadamente 2/3 de la masa solar.Su edad, teniendo en cuenta parámetros cromosféricos, es de 4750 - 5000 millones de años,​​ no muy distinta de la estimada por girocronología —basada en su período de rotación de 42,4 días—, que es de 5300 millones de años.​ (es)
rdfs:label
  • HR 6806 (cs)
  • HR 6806 (es)
  • HR 6806 (en)
  • HR 6806 (ko)
  • HR 6806 (nl)
  • HD 166620 (sv)
  • HD 166620 (zh)
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  • HR 6806 (en)
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