Tau

Hot blue star

Its story

τ Herculis is a blue-white subgiant 307 light-years away, set in the body of the celestial Kneeler. Its B5 IV spectrum places it among the hot, massive stars, with nearly five solar masses and 700 times the Sun's brightness. Though seemingly still, its light flickers slightly: a young variable not yet committed to its fate.

Constellation: Hercules
Apparent magnitude: 3.91
Distance: 307.4 light years
Coordinates (J2000): RA 244.935° · Dec 46.313°
Catalogue: HIP 79992 · HD 147394

Take your star to the gift that suits you best.

Choose a tier

Symbolic commemorative gift — no ownership, no IAU recognition.