Star name | Alcyone, Alcione, Alkyone, Alkione, Alcyon |
Constellation | Taurus; Tauri (genitive) |
Designation | 25 eta Tau, HD 23630, SAO 76199, BS 1165 |
Association | Pleiades, "The Seven Sisters," open cluster in Taurus |
Location (epoch 2000) | RA 3h 47m 29.0s; Dec +24d 06' 18" |
Proper motion (arcsec/y) | RA +0.019, Dec -0.044 |
Proper motion magnitude | 0.008 arcsec/y |
Spectral type | B7e III |
Color | Blue, blue-white (type late B) |
Luminosity class | Giant (class III) |
Pecularities | Prominent emission lines |
Visual magnitude | 2.87 |
Absolute visual magnitude | -2.61 |
Color index (B - V) | -0.09 |
Radial veloctiy | +10 km/s |
Distance | 407.7 ly = 125.0 pc = 3.857 Em |
Mass | 7 solar masses = 1 x 1031 kg |
Radius | 8 solar radii = 6 Gm |
Surface gravity | 0.1 solar gravities = 3 m/s2 |
Mean density | 0.01 solar densities = 20 kg/m3 |
Rotational velocity | 100 km/s |
Effective temperature | 13200 K |
Color index (U - B)0 | -0.44 |
Bolometric correction | -0.97 |
Bolometric magnitude | -2.5 |
Luminosity | 700 solar luminosities = 3 x 1029 W |