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HD 198404 (HR 7975) is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.19, allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 395 light years and it is approaching the Solar System with a heliocentric radial velocity of −21.6 km/s. HD 198404 has an optical companion located 78.2″ away along a position angle of 127° (as of 2014).

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  • HD 198404 (en)
  • HD 198404 (zh)
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  • HD 198404，又名BD+05 4626，SAO 126267、HR 7975，是一颗恒星，视星等为6.21，位于銀經52.67，銀緯-23.2，其B1900.0坐标为赤經20h 45m 0.8s，赤緯+5° -23.2′ 22″。 (zh)
  • HD 198404 (HR 7975) is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.19, allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 395 light years and it is approaching the Solar System with a heliocentric radial velocity of −21.6 km/s. HD 198404 has an optical companion located 78.2″ away along a position angle of 127° (as of 2014). (en)
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  • HD198404 (en)
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absmag v
  • +0.7 (en)
appmag v
b-v
  • +0.98 (en)
class
  • K0 (en)
constell
epoch
  • J2000.0 (en)
gravity
luminosity
mass
metal fe
  • +0.17 (en)
p error
parallax
prop mo dec
  • −0.174 (en)
prop mo ra
  • +43.408 (en)
radial v
  • −21.63 (en)
radius
temperature
u-b
  • +0.79 (en)
has abstract
  • HD 198404 (HR 7975) is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.19, allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 395 light years and it is approaching the Solar System with a heliocentric radial velocity of −21.6 km/s. HD 198404 has a simple stellar classification of K0, indicating that it is a K-type star. Its enlarged diameter of 10.54 R☉ and its low surface gravity suggest that it has evolved away from the main sequence to become a giant star. HD 198404 has 3.12 times the mass of the Sun and radiates at 56 times the luminosity of the Sun from its photosphere at an effective temperature of 4,809 K, giving it a yellowish orange hue. The star is metal enriched, having an iron abundance 48% greater than that of the Sun. HD 198404 has an optical companion located 78.2″ away along a position angle of 127° (as of 2014). (en)
  • HD 198404，又名BD+05 4626，SAO 126267、HR 7975，是一颗恒星，视星等为6.21，位于銀經52.67，銀緯-23.2，其B1900.0坐标为赤經20h 45m 0.8s，赤緯+5° -23.2′ 22″。 (zh)
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