Delta Boötis (δ Boo / δ Boötis) is a
binary starA binary star is a star system consisting of two stars orbiting around their common center of mass. The brighter star is called the primary and the other is its companion star, comes, or secondary...
in the
constellationIn modern astronomy, a constellation is an area of the celestial sphere, defined by exact boundaries.The term "constellation" can also be used loosely to refer to just the more prominent visible stars that seem to form a pattern in that area.-Definitions:...
BoötesBoötes is a constellation in the northern sky, located between 0° and +60° declination, 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, meaning herdsman or plowman...
. It is approximately 117
light yearsLight Years is the seventh album by Australian singer Kylie Minogue and was released in 2000. It reached number two in the United Kingdom and one on the Australian album charts and number two in New Zealand being certified platinum there . Light Years is largely seen as Minogue's "comeback" album...
from
EarthEarth is the third planet from the Sun. It is the fifth largest of the eight planets in the solar system, and the largest of the terrestrial planets in the Solar System in terms of diameter, mass and density...
.
Discussion
Ask a question about 'Delta Boötis' Start a new discussion about 'Delta Boötis' Answer questions from other users |
Delta Boötis (δ Boo / δ Boötis) is a
binary starA binary star is a star system consisting of two stars orbiting around their common center of mass. The brighter star is called the primary and the other is its companion star, comes, or secondary...
in the
constellationIn modern astronomy, a constellation is an area of the celestial sphere, defined by exact boundaries.The term "constellation" can also be used loosely to refer to just the more prominent visible stars that seem to form a pattern in that area.-Definitions:...
BoötesBoötes is a constellation in the northern sky, located between 0° and +60° declination, 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, meaning herdsman or plowman...
. It is approximately 117
light yearsLight Years is the seventh album by Australian singer Kylie Minogue and was released in 2000. It reached number two in the United Kingdom and one on the Australian album charts and number two in New Zealand being certified platinum there . Light Years is largely seen as Minogue's "comeback" album...
from
EarthEarth is the third planet from the Sun. It is the fifth largest of the eight planets in the solar system, and the largest of the terrestrial planets in the Solar System in terms of diameter, mass and density...
.
The primary component,
δ Boötis A, is a yellow
G-typeIn astronomy, stellar classification is a classification of stars based on its spectral characteristics. The spectral class of a star, is a designation of a class to a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective...
giantA giant star is a star with substantially larger radius and luminosity than a main sequence star of the same surface temperature. Typically, giant stars have radii between 10 and 100 solar radii and luminosities between 10 and 1,000 times that of the Sun. Stars still more luminous than giants are...
with an
apparent magnitudeThe apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere...
of +3.46. Its companion,
δ Boötis B, is a yellow G-type
main sequence dwarfThe main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung-Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell...
with an apparent magnitude of +8.7.
Position
Distant of about 3800 AU, the two take about 120,000 years to orbit each other.
Components
| NAME |
Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...
|
DeclinationIn astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Dec is comparable to latitude, projected onto the celestial sphere, and is measured in degrees north and south of the celestial equator...
|
Apparent magnitude The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere...
(V) |
Spectral type |
Database references |
| ADS 9559 B (BD+33 2562) |
15h 15m 38.3493s |
+33° 19' 15.323 |
7.81 |
G0Vv |
Simbad |