vendredi 19 septembre 2008

Lepus 3

Alpha Leporis

Distance (Light Years)
1280 ± 360
Visual Magnitude
Color (B-V)
Names For This StarThe name for this star derives from the Arabian name for the constellation of Lepus: Al Arnab.
Description of the StarArneb is an F0Ib supergiant star. The Visual Magnitude and distance imply a luminosity about 10,000 times that of the sun.

Beta Leporis

Distance (Light Years)
159.2 ± 6.6
Visual Magnitude
Color (B-V)
Names For This StarNihal (Nibal) would seem to derive from the name that was formerly applied by the Arabs to the four brightest stars of Lepus - Al Nihal, "The Drinking Camels." The stars were seen as camels drinking from the river of the near-by Milky Way.
Description of the StarNihal is a yellow G5II bright giant star having a luminosity about 150 times that of the sun.
According to Burnham, Nihal has a dim companion of perhaps 11th magnitude at a separation of about 2.5 arc seconds, corresponding to a projected distance of 122 AU that is, about 3 times the distance from the sun to planet Pluto. The period of the orbit of the companion appears to be several hundred years.

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