Tau

Hot blue star

Its story

Tau Capricorni is a blue-white B-type star more than eleven hundred light-years away, in the ancient constellation of the Sea-Goat. Its naked-eye light is faint —magnitude 5.24— yet it actually belongs to a sun tens of times more luminous than ours: distance does all the work of dimming. Every photon caught tonight left the star before the first Gothic cathedral was raised.

Constellation: Capricornus
Apparent magnitude: 5.24
Distance: 1136.6 light years
Coordinates (J2000): RA 309.818° · Dec -14.955°
Catalogue: HIP 101923 · HD 196662

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