| 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
|
