Brachium

Sig

Variable star

Its story

Brachium, «the arm» in Latin, extends one of the pans of Libra. A red M-class giant 288 light years away, it is a late-stage star that has swollen its atmosphere after exhausting the hydrogen at its core. Slow pulsations make it a semiregular variable: a brightness that beats with the laziness of an ancient heart across almost three centuries of travel.

Constellation: Libra
Apparent magnitude: 3.25
Distance: 288.4 light years
Coordinates (J2000): RA 226.018° · Dec -25.282°
Catalogue: HIP 73714 · HD 133216

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