Lambda Herculis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 17h 30m 44.3098s |
| Declination | +26° 06′ 38.324″ |
| Apparent magnitude (V) | 4.41 |
| Characteristics | |
| Evolutionary stage | red giant branch or red clump |
| Spectral type | K3.5III |
| U−B color index | +1.68 |
| B−V color index | +1.44 |
| Astrometry | |
| Radial velocity (Rv) | −26.51 km/s |
| Proper motion (μ) | RA: +18.782 mas/yr Dec.: +16.184 mas/yr |
| Parallax (π) | 8.2943±0.0921 mas |
| Distance | 393 ± 4 ly (121 ± 1 pc) |
| Absolute magnitude (MV) | −0.86 |
| Details | |
| Mass | 1.18 M☉ |
| Radius | 40 R☉ |
| Luminosity | 400 L☉ |
| Surface gravity (log g) | 1.30 cgs |
| Temperature | 4,063 - 4,079 K |
| Metallicity [Fe/H] | 0.023 dex |
| Rotational velocity (v sin i) | <1.5 km/s |
| Age | 3.98 or 7.23 Gyr |
| Other designations | |
| λ Her, 76 Herculis, BD+26°3034, FK5 1460, HD 158899, HIP 85693, HR 6526, SAO 249461 | |
| Database references | |
| SIMBAD | data |
Lambda Herculis (λ Herculis. abbreviated Lambda Her, λ Her), formally named Maasym /ˈmeɪəsɪm/, is a star in the constellation of Hercules. From parallax measurements taken during the Gaia mission, it is approximately 393 light-years from the Sun.