- Canes Venatici
name = Canes Venatici
abbreviation = CVn
genitive = Canum Venaticorum
symbology = the Hunting Dogs
RA = 13
areatotal = 465
arearank = 38th
numbermainstars = 2
numberbfstars = 21
numberstarsplanets = 0
numberbrightstars = 1
numbernearbystars = 1
Cor Caroli(α CVn)
starmagnitude = 2.90
neareststarname = β CVn
stardistance = 27.4
numbermessierobjects = 5
Ursa Major Boötes Coma Berenices
latmax = 90
latmin = 40
month = May
Canes Venatici (pron-en|ˈkeɪniːz vɨˈnætɨsaɪ, _la.
hunting dogs) is a small northern constellationthat was introduced by Johannes Heveliusin the 17th century. It represents the dogs "Chara" and "Asterion" held on a leash by Boötes.
Canes Venatici is one of three constellations that represent dogs, along with
Canis Majorand Canis Minor. The constellation's brightest staris Cor Caroli(α² CVn), named by Edmund Halleyin memory of the king Charles I, King of England, or his son, Charles II. It is of magnitude 2.90. La Superba(Y CVn) is a semiregular variable starthat varies between magnitudes 4.7 and 6.2 over a period of around 158 days. It is a carbon starand is famous for being deep red.
AM CVn, a very blue star of magnitude 14, is the prototype of a special class of
cataclysmic variable stars, in which the companion star is a white dwarf, rather than a main sequence star. RS CVn is the prototype of a special class of binary stars [ [http://simbad3.u-strasbg.fr/sim-id.pl?protocol=html&Ident=RS+CVn SIMBAD Query Result: RS CVn -- Variable of RS CVn type] on the SIMBAD database] of chromospherically active and optically variable components.
Notable deep sky objects
Canes Venatici contains five
Messier objects, including four galaxies. One of the more significant galaxies in Canes Venatici is the Whirlpool Galaxy(M51, NGC 5194) and NGC 5195, a small barred spiral galaxythat is seen face on. This was the first galaxy recognised as having a spiral structure, this structure being first observed by Lord Rosse in 1845.
Other notable spiral galaxies in Canes Venatici are the
Sunflower Galaxy(M63, NGC 5055), Messier 94(NGC 4736), and Messier 106(NGC 4258). Messier 3(NGC 5272) is a globular cluster. It is 18' in diameter, and at magnitude 6.3 is bright enough to be seen with binoculars.
The name of the
constellationof Bootesmeans "herdsman". Some of its component stars were traditionally described as representing his cudgel, which in Greek was called Κολλοροβος. When the Almagestwas translated from Greek to Arabic, the translator did not know the Greek word Κολλοροβος, but rendered it as the nearest-looking Arabic word: "dhāt al-kullāb" ذات الكلاب "having a hook", probably thinking of a shepherd's crook. When the Arabic text was translated into a Western European language, the translator mistook the Arabic word كلاب as "kilāb" = "dogs": Latin"hastile habens canes" = "spearshaft having dogs", which expression floated about the astronomical literature until Hevelius decided to find those dogs in the sky.
The northern of the two hunting dogs was named "Asterion", and was sometimes regarded as an independent constellation or at least an asterism. The southern dog was named "Chara". The name of the dogs still lives in the alternate names of α CVn.
The star α CVn was initially regarded as an independent asterism or constellation. Its full name was "Cor Caroli Regis Martyris" (after
Charles I of Englandwho was executed for high treason) [ [http://www.lindahall.org/events_exhib/exhibit/exhibits/stars/she.htm Linda Hall exhibit: Out of This World, page 15] (Manilius, Marcus)] , but irrespective of royal sympathies, such a name required abbreviation. Furthermore, the constellation contained just 1 star, α CVn, which in the end got the name Cor Caroli.
* Ian Ridpath and Wil Tirion (2007). "Stars and Planets Guide", Collins, London. ISBN 978-0007251209. Princeton University Press, Princeton. ISBN 978-0691135564.
* [http://www.daveweb.co.uk/SloanCV.pdf Photographic Catalogue of Deep Sky Objects in Canes Venatici]
* [http://www.allthesky.com/constellations/canesvenatici/ The Deep Photographic Guide to the Constellations: Canes Venatici]
* [http://www.ianridpath.com/startales/canesvenatici.htm Star Tales – Canes Venatici]
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