Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Denebola is a relatively near star. From Redmond , Denebola is not readily observable since it is very close to the Sun, at a separation of only 13° from it. But Denebola is a blue-white star, which means that its surface temperature is several thousand degrees hotter than the Sun's. Denebola, NGC 3800 and NGC 3872, image: Wikisky. Other stars in this association include Alpha Pictoris, Beta Canis Minoris and the open cluster IC 2391. Denebola has a mass 1.78 times that of the Sun and a radius 1.728 times solar. [13] (Deneb in Cygnus has a similar name origin.) This category only includes cookies that ensures basic functionalities and security features of the website. In Johann Bayer's Uranometria (1603), it was designated β (Beta) as the second-brightest star in the constellation. Zavijava (Beta Virginis), a magnitude 3.6 F-type main sequence star in the constellation Virgo, is one of Denebola’s nearest neighbours. Denebola (β Leo, β Leonis, Beta Leonis) is the second brightest star in the constellation Leo.It is an A-class star that is about 36 light-years (11 pc) distant from earth, and has a luminosity about twelve times that of the sun.Its apparent magnitude is 2.14. A line extended from Megrez through Phecda, the inner stars of the Dipper’s bowl, points toward Regulus, the star that sits at the base of the Sickle and marks the heart of the celestial Lion. 3.324), Adhafera (Zeta Leo, mag. 70 relations. Leo also contains Wolf 359, one of the nearest stars to the Sun, the carbon star CW Leonis, the brightest star in the infrared N-band (10 μm), the variable red giant R Leonis, and Caffau’s Star (SDSS J102915+172927), one of the oldest known stars in our galaxy with an estimated age of 13 billion years. [20] As the solar system is believed to have formed out of such a disk, Denebola and similar stars such as Vega and Beta Pictoris may be candidate locations for extrasolar planets. Cor Caroli lies directly below Alkaid, the leftmost star of the handle of the Big Dipper, marking the tip of the Great Bear’s tail. Based on parallax measurements from the Hipparcos astrometry satellite, the star is at a distance of about 36 light-years (11 parsecs) from the Sun. Zosma is a main star in the constellation Leoand makes up the constellation outline. Denebola is 15 times brighter than our sun, and hotter, having estimated surface temperatures of around 8.500 K. Thus, it is around 1.4 times hotter than our s… Denebola, along with Spica and Arcturus, is part of the Spring Triangle asterism, and by extension, also of the Great Diamond together with the star Cor Caroli. Acamar Achernar Acrux Adhara Albireo Alchiba Alcor Alcyone Aldebaran Alderamin Algenib Algol Algorab Alhena Alioth Alkaid Alkes Almach Alnair Alnilam Alnitak Alpha Centauri Alphard Alphecca Alpheratz Altair Aludra Ankaa Anser Antares Arcturus Ascella Asterope Atlas Atria Avior Baten Kaitos Bellatrix Betelgeuse Bharani Canopus Capella Caph Castor Celaeno Deneb Denebola Diphda Dubhe Electra Elnath Eltanin Enif Fomalhaut Gacrux Gamma Cassiopeiae Gienah Ginan Hadar Hamal Imai Izar Kaus Australis Kaus Borealis Kaus Media Kepler-22 Kochab Kraz Maia Marfik Markab Megrez Meissa Menkalinan Menkar Menkent Merak Merope Mesarthim Methuselah Star Miaplacidus Mimosa Minkar Mintaka Mira Mirach Mirfak Mirzam Mizar Mu Cephei Naos Nunki Peacock Phecda Pherkad Pleione Polaris Pollux Procyon Proxima Centauri Rasalhague Regor Regulus Rho Ophiuchi Rigel Rigil Kentaurus Ruchbah Sabik Sadr Saiph Sargas Scheat Schedar Segin Seginus Shaula Sheratan Sirius Spica Stephenson 2-18 Suhail Taygeta Thuban Toliman Unukalhai UY Scuti Vega VV Cephei VX Sagittarii Wasat Wezen WOH G64 Zeta Reticuli Zubenelgenubi Zubeneschamali. These cookies do not store any personal information. Observations with the Infrared Astronomical Satellite (IRAS) in the 1980s attributed these to circumstellar dust. Denebola is a prominent member of the fairly common "Vega" class of stars that are surrounded by disks of infrared-emitting dust. Denebola shows a strong infrared excess, showing a circumstellar debris disk of cool dust in orbit around it. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[15] to catalog and standardize proper names for stars. It’s almost twice as massive as the Sun, and about 15 times brighter. Other “tail” stars are Deneb (Alpha Cygni), marking the tail of the Swan (Cygnus), Deneb Algedi (Delta Capricorni), the tail of the Goat (Capricornus), and Aldhanab (Gamma Gruis), originally marking the tail of the Southern Fish, but now representing the eye of the Crane (Grus). The name Denebola (pronunciation: /dəˈnɛbələ/) comes from the Arabic name Deneb Elased, derived from ðanab al-asad, meaning “the tail of the lion.” It refers to the star’s position in the constellation. These cookies will be stored in your browser only with your consent. This website uses cookies to improve your experience while you navigate through the website. Denebola is an A-type main sequence star with 75% more mass than the Sun and 15 times the Sun's luminosity. Fixed star Denebola, Beta Leonis, is a blue star in the tail of the Lion, Leo constellation. Denebola is an A-type main sequence star with 75 percent the … However, the high rate of rotation results in an oblate shape with an equatorial bulge. Denebola shows excess emissions in the infrared. [7], Based upon the star's spectrum, it has a stellar classification of A3 Va,[3] with the luminosity class 'Va' indicating this is a particularly luminous dwarf, a main sequence star that is generating energy through the nuclear fusion of hydrogen at its core. 3.33), Eta Leonis (mag. While Regulus is brighter, Denebola forms a more equilateral triangle with the luminaries of Boötes and Virgo. It is mandatory to procure user consent prior to running these cookies on your website. Such disks contain populations of colliding planetesimals, which supply the dust, and make the host stars candidate locations for exoplanets. The Spring Triangle and the Great Diamond, image: Wikisky. Shining with a white hot light 22 times brighter than the sun, this beacon's name was originally "Dhanab al Asad", or 'tail of the lion' in Arabic. It has an apparent magnitude of 2.113 and an absolute magnitude of +1.93. Leo is home to many bright deep sky objects. Ancient Chinese astronomers designated it the first star of the five-star asterism "Seat of the Five Emperors", hence its Chinese name 五帝座一 (Wǔdìzuò-yī). The pair are separated by around 100 AU, have an orbital period of about 600 years, and share a common proper motion. Beta Leonis (or Denebola) is the second brightest star in the constellation Leo.It is a type A3V star. It’s in the east as night falls, at the bottom of the figure that outlines the lion. Its shape is an oblate spheroid. This means that Denebola's consuming its nuclear fuel at a faster rate, so it'll live a shorter life. Its estimated age is between 100 and 380 million years. Like other zodiac constellations, it was first listed by the Greek astronomer Claudius Ptolemy in the 2nd century CE and is considered one of the 48 Greek constellations. Delta Scuti variables are young pulsating stars that exhibit slight variations in brightness (less than 1 magnitude) over a period of 30 minutes to 7 hours due to both radial and non-radial pulsations. Leo is the 12th largest constellation in the sky, occupying an area of 947 square degrees. Begin typing the name of a town near to you, and then select the town from the list of options which appear below. The traditional name Denebola is shortened from Deneb Alased, from the Arabic phrase ذنب الاسد ðanab al-asad 'tail of the lion', as it represents the lion's tail, the star's position in the Leo constellation. Denebola (β Leo, β Leonis, Beta Leonis) is the third brightest star in the zodiac constellation of Leo. The outer layer of the star is ejected, while the core collapses into a very hot neutron star about 20 kilos. We also use third-party cookies that help us analyze and understand how you use this website. Useful catalogue numbers and designations … 1", https://en.wikipedia.org/w/index.php?title=Denebola&oldid=982672908, Creative Commons Attribution-ShareAlike License, This page was last edited on 9 October 2020, at 16:26. This occurs at the end of a star's lifetime, when its nuclear fuel is exhausted and it is no longer supported by the release of nuclear energy… This will cause a blast wave that ejects the star's envelope into interstellar space. Denebola is a suspected Delta Scuti type variable star, meaning its luminosity varies very slightly over a period of a few hours. Along with Arcturus and Spica, Denebola is sometimes also considered to be part of the Spring Triangle instead of Regulus. Necessary cookies are absolutely essential for the website to function properly. 2.98), Chertan (Theta Leo, mag. Because of its fast rotation rate, Denebola is flattened at the poles and has an equatorial bulge. reported variations in brightness with an amplitude of 0.025 magnitudes over a period of 0.05 days. Denebola /dəˈnɛbələ/,[12] designated Beta Leonis (β Leonis, abbreviated Beta Leo, β Leo) is the second-brightest star in the zodiac constellation of Leo, although the two components of the γ Leonis double star, which are unresolved to the naked eye, have a combined magnitude brighter than it. Its mass is estimated at 19 M☉. From Redmond , Denebola is visible in the morning sky, becoming accessible around 00:25, when it reaches an altitude of 13° above your eastern horizon.It will then reach its highest point in the sky at 06:04, 56° above your southern horizon. With a surface temperature of 8,500 K, it is 15 times more luminous than the Sun. It is the second brightest star in Leo and its name refers to the tail of the Lion. The main component in this subsystem is a K2V-type star, with the companion being approximately a M4V-type star. Denebola is the second brightest star in Leo and the 61st brightest star in the sky. [21], In astrology, Denebola was believed to portend misfortune and disgrace. The name Denebola was officially approved by the International Astronomical Union’s (IAU) Working Group on Star Names (WGSN) on June 30, 2016. This suggests that they were born in the same location, and perhaps initially formed an open cluster. It was the homeworld of the Denobulans, a warp-capable humanoid species, as well as of the Denobulan lemur. These stars are not gravitationally bound, but they share a common motion through space, indicating that they formed in the same stellar nursery and were once members of an open cluster. Kinematic studies have shown that Denebola is part of a stellar association dubbed the IC 2391 supercluster. For other uses, see, "VLTI near-IR interferometric observations of Vega-like stars", Centre de données astronomiques de Strasbourg, "The Star Catalogue Commonly Appended to the Alfonsine Tables", "Bulletin of the IAU Working Group on Star Names, No. It will be lost to dawn twilight around 06:49, 55° above your southern horizon. The star is a fast spinner, with a projected rotational velocity of 128 km/s. [22], This article is about the star. 1.40), Algieba (Gamma Leo, mag. Star Characteristics and Features. Denebola is relatively easy to find because it is part of the Great Diamond and lies near the prominent Sickle of Leo. As its name implies, a neutron star is an exotic type of star that is composed entirely of neutrons. The best time of year to observe the stars and deep sky objects in Leo is during the month of April, when the constellation rises high in the evening sky. It marks the Lion's tail. The star is surrounded by an isothermal dust shell with a temperature of about 120 K (-153° C) and a radius of 39 astronomical units from the star. As the 11th century Iranian scholar Al-Biruni explained, “The heat turns away when it rises, and the cold turns away when it disappears.”. It exhibits variations in its brightness 0.025 magnitudes roughly ten times per day. Denebola is suspected of being a Detla Scuti type variable star. Denebola is a main-sequence star of spectral type A3Va, it is a particularly luminous dwarfgenerating energy through nuclear fusion at its core. Denebola is located in the constellation Leo. of the weather), as the star's individual title. The nearest star to Denebola is Ross 119, a class M dwarf located at a distance of only 3.6 light years from Denebola. Several bright Messier galaxies can also be found in the region of the sky between Denebola and the brighter Regulus. 2.113), Zosma (Delta Leo, mag. Observations with the Herschel Space Observatory have provided resolved images, which show the disk to be located at a radius of 39 astronomical units from the star, or 39 times the distance from the Earth to the Sun. In total more than sixty probable members of the group have been identified. It is the point or the top star of this shape. The Leo Triplet of galaxies, consisting of the spiral galaxies Messier 65, Messier 66, and NGC 3628, appears closer to Denebola, while the M96 Group, centred on the spiral galaxy Messier 96 and including the spiral galaxy Messier 95 and the elliptical Messier 105, lies closer to Regulus. The brightest members of the cluster include the elliptical galaxies Messier 49, Messier 87 (Virgo A), Messier 60, and Messier 89, the barred spiral Messier 61, the intermediate spiral Messier 90, and the grand design spiral galaxy Messier 100. 2.56), Epsilon Leonis (mag. The WGSN's first bulletin of July 2016[16] included a table of the first two batches of names approved by the WGSN, which included Denebola for this star. The star can easily be seen without binoculars. The name Denebola comes from the Arabic Deneb Alased, meaning Tail of the Lion. Arcturus and Spica are found by following the arc of the Dipper’s handle. Denebola — sometimes Deneb (meaning "tail") — is the modern name for this star, abbreviated from Al Dhanab al Asad, the Lion's Tail, the Greek Alkaia (meaning 'Mallow'); the 17th century German astronomer Bayer gave it as Denebalecid and Denebaleced; English writer on globes John Chilmead (circa 1639), as Deneb Alased; and the 17th … Interferometric observations give a radius that is about 173% that of the Sun. Variations include Denebalezeth, Denebaleced, Dhanbol-asadi, Nebolellesed, and Deneb Aleet. In addition to the Leo Triplet and the M66 Group, the constellation contains the spiral galaxies NGC 2903, NGC 3626, NGC 3370 (the Silverado Galaxy), NGC 3190, and NGC 3607, the Leo Cluster of galaxies, whose brightest member is the elliptical galaxy NGC 3842, and the interacting galaxies NGC 3226 and NGC 3227 (Arp 94). The centre of the cluster lies halfway between Denebola and the fainter yellow giant Vindemiatrix (Epsilon Virginis) in Virgo. Denebola is a proposed member of the Argus Association (the IC 2391 supercluster), a stellar association that also includes the open cluster IC 2391 (the Omicron Velorum Cluster) and the stars Alpha Pictoris, Gomeisa (Beta Canis Minoris), and Epsilon Pavonis. It also bears the Flamsteed designation of 94 Leonis (assigned on the basis of increasing right ascension rather than luminosity) and additional designations followed as the star was recorded in subsequent star catalogues. 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Astronomer Ulugh Beg, gives the name denebola comes from the list of options which appear below to! That help us analyze and understand how you use this website Vindemiatrix ( Epsilon )! The second brightest star in Leo are Regulus ( Alpha Leo, mag two stars side by side denebola.