Denebola (β Leo / β Leonis / Beta Leonis) is the second brightest star in the constellation Leo.
Denebola is a white A3V main sequence star. The star is 1.5 times the diameter of the sun about 15 times as luminous. The spectral type implies an effective temperature of 9100 K. The luminosity suggests a mass about 2.3 times the mass of the sun.
From Denebola (beta Leonis) draw a line to the bright star to the southeast, Arcturus (alpha Bootis). Alpha Comae is found on this line at about the midpoint.
This chart shows the distribution of bright galaxies in the core on Virgo Galaxy Cluster between e Virginis (Vindemiatrix) and b Leonis (Denebola).
At the tip of the lion's tail the beautiful blue-white main sequence star beta Leo, Denebola is located. Viewed through a telescope beta Leo seems to have an orange companion. But actually the two stars are far away from each other.
The champion is "Deneb," which means "tail" and which has at least seven prominent variations, beginning with first magnitude Deneb itself, Alpha Cygni, then going through Denebola (Beta Leonis), Deneb Kaitos (Beta Ceti), to those quite obscure.
[4807] beta Leonis, also known as Denebola ("the tail of the lion"), is the second brightest star in the constellation. It is an an A-class star and a Delta Scuti type variable, with slight variations in brightness every few hours.
It is located in the northeastern corner (11:42:11.1+26:42:23.7, ICRS 2000.0) of Constellation Leo, the Lion -- northeast of Zosma (Delta Leonis) and Coxa (Theta Leonis), north of Denebola (Beta Leonis), ...
The eastern part of Leo is composed of a distinct triangle of stars, Denebola ( ), Chort ( ), and Zosma ( ).
The cluster stands about one-third the way from Denebola to Alkaid. (See star chart). A casualty of light pollution, Coma Berenice's beautiful star cluster once enraptured people in the ancient world.
Adhafera (ζLeo), Denebola (β Leo), Algieba (γ1 Leo), Al Minliar al Asad (κ Leo), Alterf (λ Leo), Chort (Chertan, θ Leo), Ras Elased Australis (Algenubi, ε Leo), Ras Elased Borealis (Raslas, μ Leo), ...
DENEBOLA (Beta Leo)
ALGIEBA (Gamma 1 Leo)
Zosma (Delta Leo)
Ras Elased Australis (Epsilon Leo)
Adhafera (Zeta Leo)
Chort (Theta Leo)
Al Minliar al Asad (Kappa Leo)
Alterf (Lambda Leo)
Ras Elased Borealis (Mu Leo)
Subra (Omicron Leo) ...
The tail is marked by the star Beta Leonis, called Denebola from the Arabic for ‘the lion's tail'.
Named stars: Alpha Leo (Regulus), Beta Leo (Denebola), Gamma Leo (Algieba), Delta Leo (Duhr), Epsilon Leo (Ras Elased Australis), Zeta Leo (Aldhafera), Mu Leo (Ras Elased Borealis), Omicron Leo (Subra) ...
Deneb Kaitos Schemali Iota Ceti
Denebola Beta Leonis
Dheneb Eta Ceti
Diadem Alpha Comae Berenices
Diphda Beta Ceti
Dnoces Iota Ursae Majoris
Dschubba Delta Scorpii
Dubhe Alpha Ursae Majoris
Duhr Delta Leonis ...
The second-brightest star (Beta Leo) is Denebola (meaning "tail of the lion"), and the third-brightest star (Gamma 1 Leo) is Algieba (meaning "forehead"). The spiral galaxies M65, M66, M95, M96, and the elliptical galaxy M105 are nearby.
The radiation is coming from a huge circular shell of dust surrounds the star extending outwards to 140 AU in radius, much like those that encompass Fomalhaut, Beta Pictoris, and Denebola.
Fomalhaut is a bluish white star, younger than our Sun and is located about 25 light years away. It's surrounded by a warped disk formed from icy dust particles similar to that around Vega, Beta Pictoris and Denebola.
 See also: Star, Deneb, Constellation, Sun, Sky
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