Zet-1

Hot blue star

Its story

Zeta Coronae Borealis is one of the most celebrated doubles of the Northern Crown: two blue-white stars 6.3 arcseconds apart that split at modest magnification. The brighter component is itself a spectroscopic triple of massive stars, making the whole system in truth a quadruple. At 473 light-years, it shines within the diadem of seven stars that crowns the spring sky.

Constellation: Corona Borealis
Apparent magnitude: 4.64
Distance: 473.4 light years
Coordinates (J2000): RA 234.844° · Dec 36.636°
Catalogue: HIP 76669 · HD 139891

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Symbolic commemorative gift — no ownership, no IAU recognition.