The constellation contains 47 Tucanae, one of the brightest globular clusters in the sky, and most of the Small Magellanic Cloud.
Tucana is not a prominent constellation as all of its stars are third magnitude or fainter; the brightest is Alpha Tucanae with an apparent visual magnitude of 2.87. [20], Beta, Delta and Kappa are multiple star systems containing six, two and four stars respectively. [39] The composition and mass of this star are very similar to the Sun, with a slightly lower mass and an estimated age of three billion years. The brightest star in the constellation is Alpha Tucanae, with an apparent magnitude of 2.86. [45] HD 7199 has spectral type KOIV/V and is located 117 light-years away. It has a mass at least 10.39 times that of Jupiter and orbits the star with a period of 5,501 days. [23] The Kappa Tucanae system shines with a combined apparent magnitude of 4.25, and is located around 68 light-years from the Solar System. It is in fact one of the most luminous stars known.
Its binary companion is located 5 arc seconds away and has an apparent magnitude of 7.3. The galaxy was discovered by R. J. Lavery in 1990. It has the stellar classification of G6V and an apparent magnitude of 6.54. [16] Nothing is known about the companion. Multiple Planet Systems from the HARPS Volume Limited Sample", "The HARPS Search for Southern Extra-solar Planets. French explorer and astronomer Nicolas Louis de Lacaille labelled them Alpha to Rho in 1756, but omitted Omicron and Xi, and labelled a pair of stars close together Lambda Tucanae, and a group of three stars Beta Tucanae. [6] It was interpreted on Chinese charts as Niǎohuì "bird's beak", and in England as "Brasilian Pye", while Johannes Kepler and Giovanni Battista Riccioli termed it Anser Americanus "American Goose", and Caesius as Pica Indica. NGC 406 is a spiral galaxy in Tucana constellation. As is typically observed in this kind of spiral galaxy, the yellowish central bulge, dominated by an older stellar population, is less prominent and almost totally embedded in the disk structure. [57], Constellation in the southern celestial hemisphere, The 41 additional constellations added in the 16th, 17th and 18th centuries, CS1 maint: multiple names: authors list (, Dutch celestial cartography in the Age of Discovery, High Accuracy Radial Velocity Planet Searcher, "On Frederick de Houtman's Catalogue of Southern Stars, and the Origin of the Southern Constellations", Monthly Notices of the Royal Astronomical Society, "Kappa Tucanae – Double or Multiple Star", "Kappa Tucanae A – Star in Double System", "Kappa Tucanae B – Star in Double System", "Lambda 2 Tucanae – Red Giant Branch Star", "Theta Tucanae – Variable Star of Delta Scuti type", "Delta Scuti and the Delta Scuti Variables", "Asteroseismology of the Multiply Periodic Delta Scuti Star Theta Tucanae", "Frequency Analysis of the Delta Scuti star, Theta Tucanae", "The HARPS Search for Southern Extra-solar Planets XXII. In the end, the name Tucana won out. The primary star is a blue-white dwarf belonging to the spectral class B9.5V.
The constellation of Tucana, the Toucan, is best viewed in Fall during the month of November. It is 65 light years across. The younger population arose only 5 million years ago (about the time Earth’s first hominids began to walk on two feet). [1] The official constellation boundaries, as set by Eugène Delporte in 1930, are defined by a polygon of 10 segments. [36][37], Zeta Tucanae is a yellow-white main sequence star of spectral type F9.5V and an apparent magnitude of 4.20 located 28 light-years away from the Solar System. The furthest figure is derived from either the 1997 or 2007 Hipparcos star catalogue parallax figure and it has been known to produce distances that are wrong.
It is a companion galaxy to the Milky Way and a member of the Local Group of galaxies. NGC 248 is an emission nebula in Tucana. It was not one of the original constellations that had been devised by Ptolemy, instead it was created by Pieter Dirkszoon Keyser and Frederick de Houtman years later. [8], Irregular in shape, Tucana is bordered by Hydrus to the east, Grus and Phoenix to the north, Indus to the west and Octans to the south. The smallest of these infant stars is only half the mass of our Sun. Curiously, the infant stars are strung along two intersecting lanes in the nebula, resembling a “T” pattern in the Hubble plot.
Although star birth is common within the disk of our galaxy, this smaller companion galaxy is more primeval in that it lacks a large percentage of the heavier elements that are forged in successive generations of stars through nuclear fusion. [54] It is located 870 kiloparsecs (2,800 kly) from the Solar System and around 1,100 kiloparsecs (3,600 kly) from the barycentre of the Local Group—the second most remote of all member galaxies after the Sagittarius Dwarf Irregular Galaxy. The stars mentioned are from the Hipparcos catalogue or have been added because of their special status. [29] The system is 186 light-years distant. If you know of a star that is nearer or further then do let me know in the comments and I'll add it to the site.
The deep image also shows a significant number of more distant galaxies in the background. It was discovered in the 1820s by James Dunlop. The dim star has an apparent magnitude of 5.99.
[11], The layout of the brighter stars of Tucana has been likened to a kite. [40] It appears to have a debris disk orbiting it at a minimum radius of 2.3 astronomical units. [46] HD 219077 has a planet around 10 times as massive as Jupiter in a highly eccentric orbit. You can decline to give a name which if that is the case, the comment will be attributed to a random star. Tucana (The Toucan) Constellation. The outer planet has at least 0.33 times the mass of Jupiter, which makes it roughly the same size as Saturn, and an orbital period of 567.94 days. It has 83 percent of the Sun’s mass and 92 percent of the solar radius.
Tucana constellation lies in the southern hemisphere.
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