T Tauri is a variable star located in the Constellation of the Taureau, and belonging to the cluster of Hyades, not far from Ain (ε Tauri). She was discovered in 1852 by John Russell Hind.

T Tauri is the prototype of variable stars of the type T Tauri, and like all the stars T Tauri, it is very young person, old of approximately a million years only. She is located at roughly 460 light-years Solar system, and its Magnitude connects varies in an unforeseeable way between +9,3 and +14.

The system T Tauri is composed of at least three stars, of which only one emits in the spectrum the visible one; the two others emit especially in the Infrarouge, and also in the field radio for one of them. Observations carried out using the Broad Very Array showed that the youngest star (the star T Tauri strictly speaking) abruptly changed orbit after being last very close to the one of his/her companions, and was even perhaps ejected system.

Near to the stellar system is NGC 1555, a Nébuleuse by reflection (also known under the names of nebulous of Hind or nebulous variable of Hind ). This one is illuminated per T Tauri, and its luminosity thus varies same manner as that of star. Nebula NGC 1554 was probably associated with T Tauri, when it was observed in 1868 by Otto Struve, but it has since missing, or even perhaps never existed. It known under the name of nebulous is lost of Struve .

A Objet Herbig-Haro is associated with the star T Tauri.

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