Denebola

This article is about the star. For other uses, see Denebola (disambiguation).
Not to be confused with Deneb, a star in the constellation Cygnus.
Denebola
Location of β Leonis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Leo
Pronunciation /dəˈnɛbələ/,[1]
Right ascension 11h 49m 03.57834s[2]
Declination +14° 34′ 19.4090″[2]
Apparent magnitude (V) 2.14[3]
Characteristics
Spectral type A3Va[4]
U−B color index +0.07[5]
B−V color index +0.09[5]
Variable type δ Sct[3]
Astrometry
Radial velocity (Rv)−0.2[6] km/s
Proper motion (μ) RA: −497.68[2] mas/yr
Dec.: −114.67[2] mas/yr
Parallax (π)90.91 ± 0.52 mas[2]
Distance35.9 ± 0.2 ly
(11.00 ± 0.06 pc)
Absolute magnitude (MV)+1.93[7]
Details
Mass1.78[8] M☉
Radius1.75±0.02[9] R☉
Luminosity12.9±0.1[9] L☉
Surface gravity (log g)4.0[10] cgs
Temperature8,262±36[9] K
Metallicity [Fe/H]+0.00[8] dex
Rotational velocity (v sin i)128[11] km/s
Age100–380[8] Myr
Other designations
Deneb Aleet, β Leonis, 94 Leo, BD+15°2383, FK5 444, GJ 448, HD 102647, HIP 57632, HR 4534, SAO 99809, LHS 2462, LTT 13249[12][13]
Database references
SIMBADdata

Denebola is the second-brightest individual star in the zodiac constellation of Leo.[14] It is the easternmost of the bright stars of Leo. It has the Bayer designation Beta Leonis or β Leonis, which are abbreviated Beta Leo or β Leo. Denebola is an A-type main sequence star with 75% more mass than the Sun and 15 times the Sun's luminosity. Based on parallax measurements from the Hipparcos astrometry satellite, the star is at a distance of 36 light-years (11 parsecs) from the Sun. Its apparent visual magnitude is 2.14, making it readily visible to the naked eye. Denebola is a Delta Scuti type variable star, meaning its luminosity varies very slightly over a period of a few hours.

  1. ^ "Denebola". Merriam-Webster.com Dictionary. Merriam-Webster.
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  14. ^ The two components of the γ Leonis double star, which are unresolved to the naked eye, have a combined magnitude brighter than it.