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Eta Herculis
Star in the constellation Hercules / From Wikipedia, the free encyclopedia
Eta Herculis (η Her, η Herculis) is a fourth-magnitude star in the constellation Hercules.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Hercules |
Right ascension | 16h 42m 53.7653s[1] |
Declination | 38° 55′ 20.116″[1] |
Apparent magnitude (V) | 3.487[1] |
Characteristics | |
Spectral type | G7.5 IIIb[1] |
U−B color index | +0.61[2] |
B−V color index | +0.92[2] |
Astrometry | |
Radial velocity (Rv) | 8.3[1] km/s |
Proper motion (μ) | RA: 35.58[1] mas/yr Dec.: -84.98[1] mas/yr |
Parallax (π) | 29.11 ± 0.52 mas[3] |
Distance | 112 ± 2 ly (34.4 ± 0.6 pc) |
Absolute magnitude (MV) | +0.84[4] |
Details | |
Mass | 2.13[4] M☉ |
Radius | 8.9 ± 0.3[5] R☉ |
Luminosity | 50[6] L☉ |
Temperature | 4,900[6] K |
Metallicity [Fe/H] | -0.28[7] dex |
Rotational velocity (v sin i) | 8[8] km/s |
Age | 1[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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