Apparent magnitude (V) 5.15 | ||
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ν Leonis, Latinised as Nu Leonis, is a binary star system in the zodiac constellation of Leo. It is faintly visible to the naked eye with an apparent visual magnitude of 5.15. The distance to this star, based upon parallax measurements, is around 500 light years. At this distance, the visual extinction from interstellar dust is 0.33 magnitudes.
This is a single-lined spectroscopic binary system with an orbital period of 137.3 days and an eccentricity of 0.7. The primary component is a B-type subgiant star with a stellar classification of B6 IV. It has about 3.37 times the mass of the Sun, 2.3 times the Sun's radius, and radiates 244 times the luminosity of the Sun from an outer atmosphere with an effective temperature of 9,552 K. The rotation rate is moderate with a projected rotational velocity of 100 km/s. Little is known about the companion.