Alcyone - η Tauri (eta Tauri)
Alcyone, also designated as η Tauri (eta Tauri), is a multiple giant star in the constellation of Taurus.
Alcyone visual magnitude is 2.87. Thanks to its high brightness, Alcyone is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.
The table below summarizes the key facts about Alcyone:
Celestial coordinates and finder chart of Alcyone
Alcyone is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Alcyone are provided in the following table:
The simplified sky map below shows the position of Alcyone in the sky:
Visibility of Alcyone from your location
Digitized Sky Survey image of Alcyone
The image below is a photograph of Alcyone from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of Alcyone is 0.019 arcsec per year in Right Ascension and -0.046 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of Alcyone from the Sun and relative movement
Alcyone is distant 367.53 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.
Spectral properties of Alcyone
Alcyone belongs to spectral class B7 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where Alcyone is situated in the Hertzsprung–Russell diagram.
Alcyone star system properties
Alcyone is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Alcyone double sysyem: