n Herculis
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 32m 35.7s |
| Declination | +5° 31′ 16″ |
| Apparent magnitude (V) | 5.63 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | B9.5III |
| U−B color index | −0.18 |
| B−V color index | −0.06 |
| Astrometry | |
| Radial velocity (Rv) | −23.38±0.21 km/s |
| Proper motion (μ) | RA: +15.556 mas/yr Dec.: −0.282 mas/yr |
| Parallax (π) | 8.5519±0.1394 mas |
| Distance | 381 ± 6 ly (117 ± 2 pc) |
| Absolute magnitude (MV) | +0.27 |
| Details | |
| Mass | 2.75 M☉ |
| Radius | 2.94 R☉ |
| Luminosity | 99 L☉ |
| Surface gravity (log g) | 3.94 cgs |
| Temperature | 10,623 K |
| Rotational velocity (v sin i) | 9.6 km/s |
| Age | 237 Myr |
| Other designations | |
| 28 Herculis, BD+05°3223, HD 149121, HIP 81007, HR 6158, SAO 121676 | |
| Database references | |
| SIMBAD | data |
n Herculis, also known as 28 Herculis, is a mercury-manganese star in the constellation Hercules at a distance of approximately 381 light-years (about 117 parsecs) from the Sun. The apparent magnitude of the star is +5.6. Once in the constellation Ophiuchus, it was also catalogued as 11 Ophiuchi.