8 Herculis
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  | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Hercules[1] |
| Right ascension | 16h 08m 46.6312s[2] |
| Declination | +17° 12′ 20.292″[2] |
| Apparent magnitude (V) | +6.13[1] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A0Vnn[3] |
| B−V color index | −0.003±0.005[1] |
| Astrometry | |
| Radial velocity (Rv) | −17.0±4.3[1] km/s |
| Proper motion (μ) | RA: −18.098(35) mas/yr[2] Dec.: −31.408(43) mas/yr[2] |
| Parallax (π) | 8.1684±0.0430 mas[2] |
| Distance | 399 ± 2 ly (122.4 ± 0.6 pc) |
| Absolute magnitude (MV) | +1.18[1] |
| Details | |
| Mass | 2.52[4] M☉ |
| Radius | 2.54[4] R☉ |
| Luminosity | 55[4] L☉ |
| Surface gravity (log g) | 4.03[4] cgs |
| Temperature | 9,863[4] K |
| Metallicity [Fe/H] | +0.10[5] dex |
| Rotational velocity (v sin i) | 259[3] km/s |
| Age | 317[6] Myr |
| Other designations | |
| 8 Her, BD+17°2967, HD 145122, HIP 79102, SAO 101962[7] | |
| Database references | |
| SIMBAD | data |
8 Herculis or 8 Her is an A-type main-sequence star 399 light-years (122.4 parsecs) away in the constellation Hercules. It is also known as HD 145122. Because of its apparent magnitude, of 6.13 the star can be very faintly seen with the naked eye in excellent conditions.
