29 Herculis is a single[11] star located around 351[1] light years away from the Sun in the northern constellation of Hercules, a few degrees away from Omega Herculis. It has the Bayer designation h Herculis, while 29 Herculis is the Flamsteed designation.[10] This star is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.84.[2] It is moving further from the Earth with a heliocentric radial velocity of +3 km/s.[2] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.195 arc seconds per annum.[12]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Hercules |
Right ascension | 16h 32m 36.29190s[1] |
Declination | +11° 29′ 16.9479″[1] |
Apparent magnitude (V) | 4.84[2] |
Characteristics | |
Evolutionary stage | giant |
Spectral type | K4.5 III[3] |
B−V color index | 1.495±0.002[2] |
Variable type | suspected[4] |
Astrometry | |
Radial velocity (Rv) | +2.92±0.20[2] km/s |
Proper motion (μ) | RA: -178.84[1] mas/yr Dec.: −79.27[1] mas/yr |
Parallax (π) | 9.29 ± 0.26 mas[1] |
Distance | 351 ± 10 ly (108 ± 3 pc) |
Absolute magnitude (MV) | −0.17[5] |
Details | |
Mass | 1.19[6] M☉ |
Radius | 42.05+0.45 −1.81[7] R☉ |
Luminosity | 384±19[7] L☉ |
Surface gravity (log g) | 1.79±0.28[8] cgs |
Temperature | 3,958±25[6] K |
Metallicity [Fe/H] | −0.18±0.09[8] dex |
Rotational velocity (v sin i) | 5.4[9] km/s |
Age | 6.53[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
This is an aging giant star with a stellar classification of K4.5 III.[3] It displays an enhanced abundance of elements generated through the alpha process, and, in particular, has a strong enhancement of silicon.[13] 29 Herculis is a suspected variable star of unknown type, and has been measured ranging in visual magnitude from 4.82 down to 4.85.[4] It is an estimated 6.53[6] billion years old with 1.19[6] times the mass of the Sun. Having exhausted the supply of hydrogen at its core, it has expanded to 42[7] times the Sun's radius. The star is radiating 384[7] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 3,958 K.[6]