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Rho Leonis

This star, which is close to the ecliptic (like the nearby Regulus), is a very early blue supergiant, which left the main sequence not long ago. The value for its distance is quite inexact - and in consequence these for mass and luminosity as well. The A-star has a fairly big partner B, probably a blue main sequence star, about which not much is known.

Constellation: Leo
Age: 7 million years
Distance: circa 4000 light-years
Visual magnitude: 3.842
Radial velocity: 42.0 km/sec
Orbit period of Rho Leonis A and B: about 1 year

Rho Leonis A

Spectral class: B1
Visual magnitude: 4.4
Luminosity: 200 000 * Sun
Mass: 23 * Sun
  

Rho Leonis B


Visual magnitude: 4.8

Back: List of big and giant stars part 2

05/02/2007

     Rho Leonis
Photo: ESO Online Digitized Sky Survey
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