🟡 Achird (η Cassiopeiae) – HIP 3821
A nearby Sun-like star in Cassiopeia ✨ mag 3.44, only 19 ly away.
F9V main sequence: 🌡️ 6012 K | 1.0 M☉ | 1.0 R☉
Binary system discovered by Herschel in 1779.
✅ Official IAU name, among the closest named stars to our Sun.
#Achird #IAU #Cassiopeia #BinaryStars
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