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Regulus is the brightest object in the constellation Leo and one of the brightest stars in the night sky. It has the Bayer designation designated α Leonis, which is Latinized to Alpha Leonis, and abbreviated Alpha Leo or α Leo. Regulus appears singular, but is actually a quadruple star system composed of four stars that are organized into two ...
Rho Leonis (ρ Leo) is a binary star in the zodiac constellation of Leo, and, like the prominent nearby star Regulus, is near the ecliptic. With an apparent visual magnitude of 3.9, [4] this star can be readily seen with the naked eye. Spectroscopic measurements give a distance estimate of about 2,930 light-years (900 parsecs) from the Earth. [6]
γ Leonis (Latinised to Gamma Leonis) is the star's Bayer designation.The A and B components of the binary are often referred to as γ 1 Leonis and γ 2 Leonis, respectively.. It also bore the traditional name Algieba or Al Gieba, which originated from the Arabic الجبهة Al-Jabhah, meaning 'the forehead' (despite this meaning, the star actually appears in the mane of Leo).
Leo, with Leo Minor above, as depicted in Urania's Mirror, a set of constellation cards published in London c.1825. Leo is also home to a bright variable star, the red giant R Leonis. It is a Mira variable with a minimum magnitude of 10 and normal maximum magnitude of 6; it periodically brightens to magnitude 4.4.
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The Leo Triplet, which includes the spiral galaxies M65, M66, and NGC 3628, [3] [4] [5] is located physically near the M96 Group. [10] Some group identification algorithms actually identify the Leo Triplet at part of the M96 Group. [4] [6] The two groups may actually be separate parts of a much larger group. [10]
AD Leonis (Gliese 388) is a red dwarf star. It is located relatively near the Sun, at a distance of 16.2 light-years (5.0 parsecs), in the constellation Leo. AD Leonis is a main sequence star with a spectral classification of M3.5V. [4] It is a flare star that undergoes random increases in luminosity. [5] [8]