Denebola (β Leo / β Leonis / Beta Leonis) is the second brightest star in the constellation Leo. Its name 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. (Deneb in Cygnus has a similar name origin.) In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Leo (Latin for lion, symbol , Unicode ♌) is a constellation of the zodiac. ... Right ascension (RA; symbol α: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... Shanil Davendra Singh rules 4 life! ... Shanil Davendra Singh rules 4 life! ... Most stars are of almost constant luminosity. ... This article does not cite its references or sources. ... Radial velocity is the velocity of an object in the direction of the line of sight. ... kilometre per second is an SI derived unit of both speed (scalar) and velocity (vector), signified by the symbol km/s or km s-1. ... The proper motion of a star is the motion of the position of the star in the sky (the change in direction in which we see it, as opposed to the radial velocity) after eliminating the improper motions of the stars, which affect their measured coordinates but are not real... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... Parallax (Greek: παραλλαγή (parallagé) = alteration) is the change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer. ... A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. ... The distance between two points is the length of a straight line segment between them. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... The parsec (symbol pc) is a unit of length used in astronomy. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us. ... Mass is a property of a physical object that quantifies the amount of matter it contains. ... In astronomy, the solar mass is a unit of mass used to express the mass of stars and larger objects such as galaxies. ... RADIUS (Remote Authentication Dial In User Service) is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ... In astronomy, the solar radius is a unit of length used to express the size of stars and larger objects such as galaxies. ... Luminosity has different meanings in several different fields of science. ... The solar luminosity, , is a unit of luminosity (power emitted in the form of photons) conventionally used by astronomers to give the luminosities of stars. ... Temperature is also the name of a song by Sean Paul. ... The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... In astronomy, the metallicity of an object is the proportion of its matter made up of chemical elements other than hydrogen and helium. ... Rotation of a plane, seen as the rotation of the terrain relative to the plane (exposure time 1. ... STAR is an acronym for: Satellite Television Asian Region, or STAR TV Scientific and Technological Advanced Research Labs, a fictional research organization in the DC Comics universe. ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Henry Draper Catalogue is an astronomy catalogue with astrometric and spectroscopic data about more than 225,000 stars. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Smithsonian Astrophysical Observatory (SAO) is a research institute of the Smithsonian Institution headquartered in Cambridge, Massachusetts, where it is joined with the Harvard College Observatory (HCO) to form the Harvard-Smithsonian Center for Astrophysics (CfA). ... In astronomy, many stars are referred to simply by catalogue numbers. ... SIMBAD (the Set of Identifications, Measurements, and Bibliography for Astronomical Data) is a database of astronomical information about objects within the Milky Way. ... Beta (upper case Î’, lower case β) is the second letter of the Greek alphabet. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Leo (Latin for lion, symbol , Unicode ♌) is a constellation of the zodiac. ... Countries where Arabic is spoken. ... Deneb (α Cyg / α Cygni / Alpha Cygni) is the brightest star in the constellation Cygnus and one of the brightest stars in the night sky, with apparent magnitude 1. ... Cygnus (Latin for swan) is a northern constellation. ...

Denebola is an A-type star, with a surface temperature of about 8500 K. It is about 36 light years distant from earth, and has a luminosity about twelve times that of the sun. Its apparent magnitude is 2.14. Denebola is a Delta Scuti type variable star, meaning its luminosity varies very slightly over a period of a few hours. The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... A Delta Scuti variable is a variable star which exhibits variations in its luminosity due to both radial and non-radial pulsations of the stars surface. ... Most stars are of almost constant luminosity. ...

Evidence for a dusty disk

Denebola shows a strong infrared excess, which means there must be a disk of cool dust in orbit around it. As our solar system is believed to have formed out of such a disk, Denebola and similar stars such as Vega and Beta Pictoris may be good candidate locations for extrasolar planets. The dust surrounding Denebola has a temperature of about 120 K. Unsuccessful attempts have been made to image the dust disk, implying that the disk is much smaller than that surrounding Beta Pictoris, which has been imaged frequently. Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwave radiation. ... The solar system comprises the Earths Sun and the retinue of celestial objects gravitationally bound to it. ... Orihime redirects here. ... Beta Pictoris is the second brightest star in the constellation Pictor. ... Infrared image of the star GQ Lupi (A) orbited by a planet (b) at a distance of approximately 20 times the distance between Jupiter and our Sun. ...

Supercluster membership

Kinematic studies have shown that Denebola is part of a stellar association dubbed the IC 2391 supercluster. All the stars of this group share a roughly common motion through space, although they are not gravitationally bound. This implies that they were born in the same location, and perhaps initially formed an open cluster. Other stars in this association include Alpha Pictoris, Beta Canis Minoris and the open cluster IC 2391. In total more than sixty probable members of the group have been identified. In physics, kinematics is the branch of mechanics concerned with the motions of objects without being concerned with the forces that cause the motion. ... A stellar association is a very loose star cluster, looser than both open clusters and globular clusters. ... An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other. ... Alpha Pictoris (α Pic / α Pictoris) is a star in the constellation Pictor. ... Gomeisa (β CMi) is a hot, B8-class main sequence star in the constellation of Canis Minor. ... An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other. ...

Other Explanations of 'Denebola'

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References

1. Cote J. (1987), B and A type stars with unexpectedly large colour excesses at IRAS wavelengths, Astronomy and Astrophysics (ISSN 0004-6361), v. 181, p. 77-84
2. Eggen O.J. (1991), The IC 2391 supercluster, Astronomical Journal (ISSN 0004-6256), v. 102, p. 2028-2040
3. Smith B.A., Fountain J.W., & Terrile R.J. (1992), An optical search for Beta Pictoris-like disks around nearby stars, Astronomy and Astrophysics (ISSN 0004-6361), v. 261, p. 499-502

External links

• SIMBAD data page
• ARICNS
• Information page by Jim Kaler