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HD 173780 is a single star in the northern constellation Lyra, near the southern constellation border with Hercules. It is an orange-hued star that is faintly visible to the naked eye with an apparent visual magnitude of +4.84. This object is located at a distance of approximately 237 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −17 km/s.

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  • HD 173780 (en)
  • HD 173780 (pt)
  • HD 173780 (sv)
  • HD 173780 (zh)
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  • HD 173780 é uma estrela de magnitude 5 na constelação de Lyra, a cerca de 250 anos-luz de distância da Terra. É uma estrela gigante alaranjada do tipo espectral K3III, o que significa que tem uma temperatura de superfície de 3.500 a 5.000 kelvin. É muito maior e mais brilhante do que o Sol, mas é mais frio. (pt)
  • HD 173780 är en ensam stjärna belägen i den södra delen av stjärnbilden Lyran nära gränsen mot Herkules. Den har en skenbar magnitud av ca 4,84 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 13,8 mas, beräknas den befinna sig på ett avstånd på ca 237 ljusår (ca 73 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca –17 km/s. (sv)
  • HD 173780，又名BD+26 3349，SAO 86418、HR 7064，是一颗恒星，视星等为4.83，位于銀經56.5，銀緯12.9，其B1900.0坐标为赤經18h 42m 2.6s，赤緯+26° 12.9′ 18″。 (zh)
  • HD 173780 is a single star in the northern constellation Lyra, near the southern constellation border with Hercules. It is an orange-hued star that is faintly visible to the naked eye with an apparent visual magnitude of +4.84. This object is located at a distance of approximately 237 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −17 km/s. (en)
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absmag v
age gyr
appmag v
  • +4.84 (en)
b-v
class
  • K3III (en)
constell
epoch
mass
p error
parallax
prop mo dec
  • +23.819 (en)
prop mo ra
  • +17.460 (en)
rotational velocity
type
  • Horizontal-branch (en)
has abstract
  • HD 173780 is a single star in the northern constellation Lyra, near the southern constellation border with Hercules. It is an orange-hued star that is faintly visible to the naked eye with an apparent visual magnitude of +4.84. This object is located at a distance of approximately 237 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −17 km/s. This is an aging giant star with a stellar classification of K3III. It is a red clump giant, indicating it is on the horizontal branch and is generating energy through the fusion of helium at its core. The star is 2.4 billion years old with 1.7 times the mass of the Sun. With the supply of hydrogen exhausted at its core, it has expanded to 16 times the radius of the Sun. The star is radiating 92 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,468 K. (en)
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