29 Herculis
| 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 | |
| h Her, 29 Her, NSV 7812, BD+11°3008, FK5 3310, GC 22250, HD 149161, HIP 81008, HR 6159, SAO 102234, LTT 14915[10] | |
| Database references | |
| SIMBAD | data |
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]
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]
References
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- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- ^ a b c d e f Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR2 record for this source at VizieR.
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
