Boötes
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Boötes, pronounced with both 'O's as 'boötez',[1] is one of the 88 modern constellations in the northern sky. The name is from the Greek word Βοώτης, which means herdsman – someone who takes care of animals.
Click for larger image | |
List of stars in Boötes | |
Abbreviation: | Boo |
Genitive: | |
Symbology: | |
Right ascension: | 15 h |
Declination: | +30° |
Area: | 907 sq. deg. (13th) |
Main stars: | 7, 15 |
Bayer/Flamsteed stars: | 59 |
Stars known to have planets: | 9 |
Bright stars: | 3 |
Nearby stars: | 3 |
Brightest star: | Arcturus (α Boo) (−0.04m) |
Nearest star: | Wolf 498 ( ly) |
Messier objects: | |
Meteor showers: | |
Bordering constellations: | |
Visible at latitudes between +90° and −50° Best visible at 21:00 (9 p.m.) during the month of June | |
Other designations: Arctophylax |
Shape
The constellation's shape is like a kite. Boötes has the third brightest star in the night sky, called Arcturus (α Bootis).[2] The astronomer Ptolemy listed it in the 2nd century when he made a list of 48 constellations.[3]
The Cloverleaf quasar is visually in Bootes.
Main stars
- α Bootis (Arcturus) is the brightest and most important star of the constellation, with a magnitude of -0.04, the 3rd brightest star of the sky. It is an orange giant star
- β Bootis (Nekkar), yellow giant with magnitude 3.49 and 219 light years from the Earth
- y Bootis (Ceginus), Delta Scuti variable with magnitude 3,04
- δ Bootis (Princeps), another yellow giant.
Deep-sky objects
- NGC 5248, spiral galaxy, 10º south of Arcturus
- NGC 5466, globular cluster, 9º northwest of Arcturus, near M3, a globular cluster in the constellation Canes Venatici.
Boötes Media
Hubble Space Telescope image of SDSSCGB 10189, three colliding galaxies
References
- ↑ Thompson, Robert Bruce; Thompson, Barbara Fritchman (2007). Illustrated Guide Astronomical Wonders. O'Reilly Books. ISBN 978-0-596-52685-6.
- ↑ Jim Kaler. "Boötes". Stars. Retrieved 27 January 2013.
- ↑ Fuchs, Jim. "Constellation History". Modern Constellations. Archived from the original on 25 May 2012. Retrieved 27 January 2013.