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. 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. However, the high rate of rotation results in an oblate shape with an equatorial bulge. Denebola is an A-type main sequence star with 75% more mass than the Sun and 15 times the Sun's luminosity. Denebola has been classed as a Delta Scuti-type variable star (which vary in brightness by small amounts over periods lasting only hours and including radial as well as non-radial pulsations) as it exhibits small, Delta Sculti-type variability with around a 2.09 to 2.16 visual magnitude difference -- in V on UBV Johnson system (Mkrtichian and Yurkov, 1998). With an apparent magnitude of 2.113, it is the third (individually the second) brightest star in Leo, after Regulus and Algieba. The name Denebola comes from the Arabic Deneb Alased, meaning Tail of the Lion. 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. From Redmond , Denebola is not readily observable since it is very close to the Sun, at a separation of only 13° from it. It is a white main sequence star, twice the Sun's mass with 50% more of its radius. 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. 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). 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). Denebola, NGC 3800 and NGC 3872, image: Wikisky. Zosma is … We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. The stars are only 8 light years apart. When searching for Denebola look for the triangle at the back of the Leo constellation. Additionally, Diphda (Beta Ceti) was traditionally known as Deneb Kaitos, the tail of the Sea Monster (Cetus), while Iota Ceti was called Deneb Kaitos Shemali, the northern tail of the Sea Monster, and Eta Ceti was Deneb Algenubi, the southern tail of the Sea Monster. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Denebola shows excess emissions in the infrared. 3.486), Subra (Omicron Leo, mag. 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. Denebola, also 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 are unresolved to the naked eye and have a combined magnitude brighter than β.It is an A-type main sequence star with 75% more mass than the Sun and fifteen times the Sun's luminosity. Based on parallax measurements from the Hipparcos astrometry satellite, the star is at a distance of about 36 light-… reported variations in brightness with an amplitude of 0.025 magnitudes over a period of 0.05 days. Denebola is suspected of being a Detla Scuti type variable star. In the Alphonsine Tables it was recorded as Denebalezeth. 1.40), Algieba (Gamma Leo, mag. β Leonis (Latinised to Beta Leonis) is the star's Bayer designation. There is still no direct evidence of any planets orbiting Denebola, but their existence has not been ruled out either. Denebola is a suspected Delta Scuti type variable star, meaning its luminosity varies very slightly over a period of a few hours. 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. As its name implies, a neutron star is an exotic type of star that is composed entirely of neutrons. Denebola has the stellar classification A3Va, indicating a hydrogen-fusing dwarf appearing white in colour. 2.56), Epsilon Leonis (mag. Denebola is an A-type main sequence star with 75% more mass than the Sun and 15 times the Sun's luminosity. This category only includes cookies that ensures basic functionalities and security features of the website. 3.324), Adhafera (Zeta Leo, mag. The radius of the debris disk was resolved in images obtained with the Herschel Space Observatory and released in 2010. Denebola (β Leo, β Leonis, Beta Leonis) is the third brightest star in the zodiac constellation of Leo. Arcturus and Spica are found by following the arc of the Dipper’s handle. Regulus, brightest star in the zodiacal constellation Leo and one of the brightest in the entire sky, having an apparent visual magnitude of about 1.35. 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. Several bright Messier galaxies can also be found in the region of the sky between Denebola and the brighter Regulus. 3.9). In Johann Bayer's Uranometria (1603), it was designated β (Beta) as the second-brightest star in the constellation. It has 75% more mass than the Sun, which results in a much higher overall luminosity and a shorter life span on the main sequence. With a surface temperature of 8,500 K, it is 15 times more luminous than the Sun. Denebola, Beta Leonis (β Leo), is a white main sequence star located at a distance of 35.9 light years from Earth in the constellation Leo. [19] The dust surrounding Denebola has a temperature of about 120 K (−153 °C). Star type Deneb is a blue-white supergiant of the spectral type A2 Ia. It is the point or the top star of this shape. Based on the spectral type (A4V) of the star, the star's colour is blue - white. Kinematic studies have shown that Denebola is part of a stellar association dubbed the IC 2391 supercluster. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[15] to catalog and standardize proper names for stars. Denebola is a suspected variable star of the Delta Scuti type. Denebola is well-known to stargazers because it is used to find the Virgo Cluster, a cluster of galaxies that contains many bright members catalogued by Charles Messier. It exhibits variations in its brightness 0.025 magnitudes roughly ten times per day. As the 11th century Iranian scholar Al-Biruni explained, “The heat turns away when it rises, and the cold turns away when it disappears.”. [13] (Deneb in Cygnus has a similar name origin.) Other stars in this association include Alpha Pictoris, Beta Canis Minoris and the open cluster IC 2391. Its shape is an oblate spheroid. The Greeks knew the star as Alkaia, meaning “mallow.” In the Alfonsine Tables, it was listed as Denebalezeth and as Dafira, the latter denoting the tuft of hair at the end of the lion’s tail. 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. 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. 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. 2.113), Zosma (Delta Leo, mag. Denebola and the Leo Triplet, image: Wikisky. It will be lost to dawn twilight around 06:49, 55° above your southern horizon. 2.08), Denebola (Beta Leo, mag. Denebola is a member of the IC 2391 supercluster , which includes stars such as Alpha Pictoris and Beta Canis Minoris . 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. Denebola — a name that means “the tail of the lion” — is the third-brightest star of Leo. 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. Denebola lies at a distance of 35.9 light years from Earth. 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 … The Chinese asterism called Thrones of the Five Emperors is formed by Denebola with the stars HIP 57646, HIP 57320, 95 Leonis, and HIP 57779. It is the second brightest star in Leo and its name refers to the tail of the Lion. And if you placed the two stars side by side, Denebola would appear about 15 times brighter than the Sun. Denebola is an A-type main sequence star with 75 percent the … The Chinese name for Denebola is 五帝座一 (Wǔdìzuò-yī), the First Star of the Thrones of the Five Emperors. The variability of Denebola was first reported in 1970 by M. S. Frolov, who included the star on the list of suspected Delta Scuti variables. This suggests that they were born in the same location, and perhaps initially formed an open cluster. Interferometric observations give a radius that is about 173% that of the Sun. The same location, and make the host stars candidate locations for exoplanets is... The Changer ( i.e or denebola ) is the second brightest star in Leo are Regulus ( Alpha,. Type A3V star a member of the star 's colour is blue - white of colliding planetesimals, which the... Through nuclear fusion at its core interferometric observations give a radius that is about the star 's colour blue. 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