HD 158476 is a star located in the southern constellation Scorpius. It is classified as a K-type star, specifically a subgiant or a luminous main-sequence star, meaning it is somewhat cooler and potentially more evolved than the Sun. Its designation comes from the Henry Draper Catalogue.
Observational Properties
- Constellation: Scorpius
- Apparent Magnitude (V): 6.74
- This magnitude means the star is faintly visible to the naked eye under very dark sky conditions, but is typically observed with binoculars or a telescope.
- Right Ascension (J2000): 17h 29m 18.06s
- Declination (J2000): −27° 50′ 37.3″
- Parallax: 14.80 ± 0.08 milliarcseconds (derived from Gaia DR3 data)
- Distance: Approximately 67.5 parsecs (about 220 light-years) from Earth.
- Radial Velocity: −33.91 km/s
- This negative value indicates that the star is moving towards the Sun.
- Proper Motion:
- RA: −142.06 milliarcseconds per year
- Dec: −14.28 milliarcseconds per year
- These values describe the star's apparent movement across the celestial sphere.
Physical Characteristics
- Spectral Type: K0IV-V
- The "K0" indicates a star with a surface temperature cooler than the Sun's, giving it an orange-red hue.
- The "IV-V" classification suggests that it is either a subgiant (IV), having evolved slightly off the main sequence after exhausting core hydrogen, or a luminous main-sequence star (V). Its derived luminosity supports the subgiant interpretation.
- Effective Temperature: Approximately 5,100 Kelvin
- Luminosity: Roughly 7.8 times that of the Sun (L☉)
- Absolute Magnitude (V): Approximately 2.60
- This is the apparent magnitude the star would have if it were located at a standard distance of 10 parsecs, providing an intrinsic measure of its brightness.
Planetary System
As of current astronomical surveys and observations, no exoplanets have been confirmed orbiting HD 158476.Other Designations
HD 158476 is also known by other catalogue designations, including:- HIP 85750
- SAO 185675
- TYC 6845-812-1
- 2MASS J17291806-2750373