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Encyclopedia > Draco (constellation)
Draco

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Abbreviation: Dra
Genitive: Draconis
Symbology: the Dragon
Right ascension: 15 h
Declination: +75°
Area: 1083 sq. deg. (8th)
Main stars: 14
Bayer/Flamsteed stars: 72
Stars with known planets: 2
Bright stars: 3
Nearby stars: 6
Brightest star: γ Dra (Etamin) (2.23m)
Nearest star: Struve 2398 (11.5 ly)
Messier objects: 1
Meteor showers: Draconids
Bordering constellations: Boötes
Hercules
Lyra
Cygnus
Cepheus
Ursa Minor
Camelopardalis
Ursa Major
Visible at latitudes between +90° and −15°
Best visible at 21:00 (9 p.m.) during the month of July

Draco (IPA: [ˈdreɪ.koʊ], Latin: dragon) is a far northern constellation that is circumpolar for many northern hemisphere observers. It is one of the 88 modern constellations, and is also one of the 48 constellations listed by Ptolemy. This is a celestial map of the constellation Draco, the Dragon. ... The genitive case is a grammatical case that indicates a relationship, primarily one of possession, between the noun in the genitive case and another noun. ... For other uses, see Dragon (disambiguation). ... Equatorial Coordinates Right ascension (abbrev. ... In astronomy, declination (abbrev. ... Here is a list of the 88 modern constellations by their area in the sky, measured in square degrees. ... This article or section is not written in the formal tone expected of an encyclopedia article. ... Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek letters. ... Gamma Draconis (γ Dra / γ Draconis) is a star in the constellation Draco. ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... Struve 2398 is a binary star system in the constellation Draco. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one Julian year. ... The Messier objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. ... Leonid Meteor Shower A meteor shower, also known as a meteor storm, is a celestial event where a large number of meteors are seen within a very short period. ... The Giacobinids (also known as the Draconids) are a meteor shower whose parent body is the periodic comet 21P/Giacobini-Zinner. ... Boötes (IPA: ), a name deriving from Egypt, is one of the 88 modern constellations and was also one of the 48 constellations listed by Ptolemy. ... Hercules (IPA: ) is the fifth largest of the 88 modern constellations. ... For other uses, see Lyra (disambiguation). ... Cygnus (IPA: , Latin: ) is a northern constellation. ... Cepheus (IPA: ) is a northern constellation named after King Cepheus in Greek mythology, and is considered to represent a king. ... Ursa Minor (IPA: ) is a constellation in the northern sky, the name of which means Smaller Bear in Latin. ... Camelopardalis, Latin for giraffe, is the name of a large but faint northern constellation first recorded by Jakob Bartsch in 1624, but probably created earlier by Petrus Plancius. ... Ursa Major (IPA: ) is a constellation visible throughout the year in most of the northern hemisphere. ... Not to be confused with the NATO phonetic alphabet, which has also informally been called the “International Phonetic Alphabet”. For information on how to read IPA transcriptions of English words, see IPA chart for English. ... Latin was the language originally spoken in the region around Rome called Latium. ... For other uses, see Dragon (disambiguation). ... This article or section does not adequately cite its references or sources. ... Circumpolar stars are those stars which are located near the celestial poles of the celestial sphere, i. ... The Northern Hemisphere is the half of a planets surface (or celestial sphere) that is north of the equator (the word hemisphere literally means half ball). On the Earth, the Northern Hemisphere contains most of the land and about 88-90% of the human population. ... A medieval artists rendition of Claudius Ptolemaeus Claudius Ptolemaeus (Greek: ; c. ...

Contents

Notable features

The star Thuban (α Draconis) was the northern pole star around 2700 BC, during the time of the ancient Egyptians. Due to the effects of precession, it will once again be the pole star around the year 21 000 AD. Thuban (α Dra / α Draconis / Alpha Draconis) is a star (or star system) in the constellation of Draco. ... For other uses of the words Pole star and Polestar see Polestar (disambiguation). ... (28th century BC - 27th century BC - 26th century BC - other centuries) (4th millennium BC - 3rd millennium BC - 2nd millennium BC) Events 2900 - 2334 BC -- Mesopotamian wars of the Early Dynastic period 2775 - 2650 BC -- Second Dynasty wars in Egypt Germination of the Bristlecone pine tree Methuselah about 2700 BC, the... Anthem: Bilady, Bilady, Bilady Capital (and largest city) Cairo Official languages Arabic1 Government Semi-presidential republic  -  President Hosni Mubarak  -  Prime Minister Ahmed Nazif Establishment  -  First Dynasty c. ... Precession of a gyroscope Precession refers to a change in the direction of the axis of a rotating object. ...


Although Thuban's Bayer designation is α Draconis, it is not the brightest star in the constellation. At magnitude 3.65, it is more than a magnitude fainter than the brightest star, γ Draconis (Eltanin), whose magnitude is 2.23. Thuban (α Dra / α Draconis / Alpha Draconis) is a star (or star system) in the constellation of Draco. ... This article or section is not written in the formal tone expected of an encyclopedia article. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... Gamma Draconis (γ Dra / γ Draconis) is a star in the constellation Draco. ...


There are several double stars of interest in Draco. ν Draconis (Kuma) consists of two components of magnitude 4.9, 62 arcseconds apart. They can be split with binoculars. When two stars are so nearly in the same direction as seen from Earth that they appear to be a single star to the naked eye but may be separated by the use of telescopes, they are referred to as a double star. ... Nu Draconis (ν Dra / ν Draconis) is a double star in the constellation Draco. ... A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 ≈ 7. ...


R Draconis and T Draconis are Mira-type variable stars. R ranges between magnitudes 6.7 and 13 with a period of 245.5 days, and T ranges between magnitudes 7.2 and 13.5 with a period of 421.2 days. Chandra X-ray Image of Mira Mira (ο Cet / 68 Ceti / HD14386 / HIP10826 / ADS 1778 AP / Omicron Ceti) is a binary star in the constellation Cetus consisting of the red giant, Mira A or just Mira, and a white dwarf, Mira B or VZ Ceti. ... Most stars are of almost constant luminosity. ...


σ Draconis is relatively close to Earth, only 18.8 light years away. Sigma Draconis is a star system 18. ... Adjectives: Terrestrial, Terran, Telluric, Tellurian, Earthly Atmosphere Surface pressure: 101. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one Julian year. ...


The north pole of the ecliptic lies within the constellation Draco. This point is very close to the galaxy NGC 6552 and within 10 arcminutes of the Cat's Eye Nebula - NGC 6543 The plane of the ecliptic is well seen in this picture from the 1994 lunar prospecting Clementine spacecraft. ... A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60) of one degree. ... The Cats Eye Nebula: composite image using optical images from the Hubble Space Telescope and X-ray data from the Chandra X-ray Observatory The Cats Eye Nebula (NGC 6543) is a planetary nebula in the constellation of Draco. ...


Notable deep sky objects

One of the deep-sky objects in Draco is the Cat's Eye Nebula (NGC 6543), a planetary nebula that is said to look like a blue disc. There are several faint galaxies in Draco, one of which is the lenticular galaxy NGC 5866, sometimes considered to be Messier Object 102. Deep sky object (DSO) is a term used often in amateur astronomy to denote objects in the night sky other than solar system objects (such as planets, comets and asteroids), single stars and multiple star systems. ... The Cats Eye Nebula (NGC 6543) is a planetary nebula in the constellation of Draco. ... NGC 6543, the Cats Eye Nebula A planetary nebula is an astronomical object consisting of a glowing shell of gas and plasma formed by certain types of stars at the end of their lives. ... NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 17,000 parsecs in diameter and approximately 20 million parsecs distant. ... The Spindle Galaxy in Draco (also known as the Spindle Galaxy, Lenticular Galaxy NGC 5866 or NGC 5866) is a lenticular galaxy, type S0_3, in the Draco constellation. ... Galaxy M102. ...


Mythology

There are a number of myths behind the constellation Draco, due to its resemblance to a dragon [1], although alternative interpretations exist, such as the legend of the Mother Camels. The Mother Camels (Arabic alawaid) is the name given by ancient Arabic nomadic tribes to an asterism in the constellation of Draco. ...


In the most famous of the myths, Draco represents Ladon, the hundred-headed dragon that guarded the golden apples of the Hesperides. The eleventh of The Twelve Labours of Heracles was to steal the golden apples. Heracles killed Ladon with a poisoned arrow, allowing him to freely take the golden apples. According to the legend, Hera later placed the dragon in the sky as the constellation Draco. Due to its position and nearby constellations in the zodiac sign of Libra (i.e. Ursa Major, Ursa Minor, and Boötes), the group of constellations can be seen to tell the tale of the eleventh labour. Dragons play a role in Greek mythology. ... For the ancient Greek city Hesperides see Benghazi. ... Hercules and the Hydra by Antonio Pollaiuolo The Twelve Labours (Greek: dodekathlos) of Heracles (Latin: Hercules) are a series of archaic episodes connected by a later continuous narrative, concerning a penance carried out by Heracles, the greatest of the Greek heroes. ... Hercules, a Roman bronze (Louvre Museum) For other uses, see Heracles (disambiguation). ... In the Olympian pantheon of classical Greek Mythology, Hera (IPA pronunciation: ; Greek or ) was the wife and older sister of Zeus. ... It has been suggested that this article be split into multiple articles. ... Libra (IPA: , Latin: , symbol , Unicode ) is a constellation of the zodiac. ... Ursa Major (IPA: ) is a constellation visible throughout the year in most of the northern hemisphere. ... Ursa Minor (IPA: ) is a constellation in the northern sky, the name of which means Smaller Bear in Latin. ... Boötes (IPA: ), a name deriving from Egypt, is one of the 88 modern constellations and was also one of the 48 constellations listed by Ptolemy. ...


In another legend, Draco represents the dragon killed by Cadmus before founding the city of Thebes, Greece. In a third legend, it represents the dragon that guarded the Golden Fleece and was killed by Jason. The fact that the stars of this circumpolar constellation never set plays an important part in its mythologies. For other uses, see Dragon (disambiguation). ... Cadmus Sowing the Dragons teeth, by Maxfield Parrish, 1908 Cadmus, or Kadmos (Greek: Κάδμος), in Greek mythology, was the son of the king of Phoenicia (Currently Lebanon)and brother of Europa. ... Thebes (in Demotic Greek: Θήβα — Thíva, Katharevousa: — Thēbai or Thíve) is a city in Greece, situated to the north of the Cithaeron range, which divides Boeotia from Attica, and on the southern edge of the Boeotian plain. ... Jason returns with the golden Fleece on an Apulian red-figure calyx krater, ca. ... Jason (Greek: Ιάσων, Etruscan: Easun) is a hero of Greek mythology who led the Argonauts in the search of the Golden Fleece. ...


See also

This is the list of notable stars in the constellation Draco. ...

External links

Wikimedia Commons has media related to:
Draco
  • The Deep Photographic Guide to the Constellations: Draco
  • WIKISKY.ORG: Draco constellation



Image File history File links Commons-logo. ... Wikimedia Commons logo by Reid Beels The Wikimedia Commons (also called Commons or Wikicommons) is a repository of free content images, sound and other multimedia files. ...

The 88 modern Constellations
Andromeda • Antlia • Apus • Aquarius • Aquila • Ara • Aries • Auriga • Boötes • Caelum • Camelopardalis • Cancer • Canes Venatici • Canis Major • Canis Minor • Capricornus • Carina • Cassiopeia • Centaurus • Cepheus • Cetus • Chamaeleon • Circinus • Columba • Coma Berenices • Corona Australis • Corona Borealis • Corvus • Crater • Crux • Cygnus • Delphinus • Dorado • Draco • Equuleus • Eridanus • Fornax • Gemini • Grus • Hercules • Horologium • Hydra • Hydrus • Indus • Lacerta • Leo • Leo Minor • Lepus • Libra • Lupus • Lynx • Lyra • Mensa • Microscopium • Monoceros • Musca • Norma • Octans • Ophiuchus • Orion • Pavo • Pegasus • Perseus • Phoenix • Pictor • Pisces • Piscis Austrinus • Puppis • Pyxis • Reticulum • Sagitta • Sagittarius • Scorpius • Sculptor • Scutum • Serpens • Sextans • Taurus • Telescopium • Triangulum • Triangulum Australe • Tucana • Ursa Major • Ursa Minor • Vela • Virgo • Volans • Vulpecula

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