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42 Persei
42 Per
Measured
Flamsteed 42 in Perseus. Also n Persei. Spectroscopic binary.
A white A3V primary with a faint red-dwarf companion. Magnitude 5.11. About 300 light-years. Period 1.77 days. The 42 is Flamsteed’s number in Perseus.
What it supports
A live SIMBAD seat and a Grokipedia page.
What it does not
Not Algol. Not 42 Orionis.
ExactnessExact
Form42
Unitcatalogue
Strengthhard