Epoch J2000 Equinox J2000
|Right ascension||16h 47m 46.418s|
|Declination||+5° 14′ 48.285″|
|Apparent magnitude (V)||5.22|
|Spectral type||A0 (B9pCr)|
|B−V color index||-0.007|
|Radial velocity (Rv)||-16.1 km/s|
|Proper motion (μ)||RA: -20.39 mas/yr
Dec.: -39.38 mas/yr
|Parallax (π)||8.29 ± 0.27 mas|
|Distance||390 ± 10 ly
(121 ± 4 pc)
45 Herculis is a main sequence ACV star in the constellation Hercules. The Flamsteed designation for this star comes from the publication Historia Coelestis Britannica by John Flamsteed. It is the 45th star in Flamsteed list of stars in the constellation Hercules.
Its spectral classification has been measured as A0 and also as B9pCr. Based on this, it is similar in mass and luminosity to Vega. Parallax measurements show this star to be about 230 light years from the solar system.