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Alpha Leporis
Observation data
Epoch J2000      Equinox J2000
Constellation Lepus
Right ascension 05h 32m 43.8s
Declination -17° 49′ 20.3″
Apparent magnitude (V) 2.58
Spectral type F0 Ib
U-B color index 0.23
B-V color index 0.21
Variable type ?
Radial velocity (Rv) 24 km/s
Proper motion (μ) RA: 3.27 mas/yr
Dec.: 1.54 mas/yr
Parallax (π) 2.54 ± 0.72 mas
Distance approx. 1300 ly
(approx. 400 pc)
Absolute magnitude (MV) -5.40
Mass 8-10 M
Radius 70.4 R
Luminosity 13,000 L
Temperature 7,350 K
Metallicity ?
Rotation 13 km/s.
Age ? years
Other designations
Arneb, 11 Leporis, HR 1865, BD -17°1166, HD 36673, SAO 150547, FK5 207, HIP 25985.

Alpha Leporis (α Lep / α Leporis) is the brightest star in the constellation Lepus. It has the traditional name Arneb, from the Arabic أرنب ’arnab "hare".[1]

Alpha Leporis is an older, dying star that may have already passed through a supergiant phase and is now contracting and heating up in the latter phases of stellar evolution, or perhaps is still expanding into the supergiant phase. With a mass of likely less than 10 times that of the Sun, it will likely end its life as a hot white dwarf, although if it is at the heavier end of its estimated mass it may end in a spectacular stellar explosion known as a supernova.


  1. ^ Richard Hinckley Allen (1899) Star-names and Their Meanings


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