Del-2

Variable star

Its story

Delta-2 Lyrae is the dominant light of Stephenson 1, the loose open cluster to which it belongs. Once a hot blue main-sequence star, it has aged into a red supergiant swollen to nearly three hundred solar radii, radiating ten thousand times the Sun's luminosity while its brightness drifts in slow, irregular waves.

Constellation: Lyra
Apparent magnitude: 4.22
Distance: 736.3 light years
Coordinates (J2000): RA 283.626° · Dec 36.899°
Catalogue: HIP 92791 · HD 175588

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