Nu1 Arae
Encyclopedia
Nu1 Arae is a triple star system in the constellation
of Ara
, and approximately 800 light years
from the Earth
.
The primary component, ν1 Arae A, is detached blue-white B-type
main sequence star
. The secondary component, ν1 Arae B, is the 9th magnitude. The spectroscopic
companion is also blue-white B-type main sequence star. The angular distance
of this pair with a separation of 12.3 arcseconds. The mean brightness of the system is 5.67m.
ν1 Arae A itself an spectroscopic eclipsing binary of which both components are which do not fill their Roche lobe
s. ν1 Arae is an Algol type
eclipsing variable star, designated V539 Arae, and its brightness varies from 5.66m to 6.18m with a period equal to the orbital period of the binary, which is 3.17 days.
The system is sometimes referred as Upsilon1 Arae (υ1 Arae), and more generally unlettered.
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
of Ara
Ara (constellation)
Ara is a southern constellation situated between Scorpius and Triangulum Australe. Its name is Latin for "altar". Ara was one of the 48 Greek constellations described by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations defined by the International Astronomical...
, and approximately 800 light years
Light Years
Light Years is the seventh studio album by Australian recording artist Kylie Minogue. It was released on 25 September 2000 by Parlophone and Mushroom Records. The album's style was indicative of her return to "mainstream pop dance tunes"....
from the Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
.
The primary component, ν1 Arae A, is detached blue-white B-type
Stellar classification
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...
main sequence star
Main sequence
The main sequence is a continuous and distinctive band of stars that appears 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...
. The secondary component, ν1 Arae B, is the 9th magnitude. The spectroscopic
Spectroscopy
Spectroscopy is the study of the interaction between matter and radiated energy. Historically, spectroscopy originated through the study of visible light dispersed according to its wavelength, e.g., by a prism. Later the concept was expanded greatly to comprise any interaction with radiative...
companion is also blue-white B-type main sequence star. The angular distance
Angular distance
In mathematics and all natural sciences , the angular distance between two point objects, as observed from a location different from either of these objects, is the size of the angle between the two directions originating from...
of this pair with a separation of 12.3 arcseconds. The mean brightness of the system is 5.67m.
ν1 Arae A itself an spectroscopic eclipsing binary of which both components are which do not fill their Roche lobe
Roche lobe
The Roche lobe is the region of space around a star in a binary system within which orbiting material is gravitationally bound to that star. If the star expands past its Roche lobe, then the material can escape the gravitational pull of the star. If the star is in a binary system then the material...
s. ν1 Arae is an Algol type
Algol variable
Algol variables or Algol-type binaries are a class of eclipsing binary stars where the orbital plane of the stars are coincident with the line of sight from Earth. When the cooler component passes in front of the hotter one, part of the latter's light is blocked, and the total brightness of the...
eclipsing variable star, designated V539 Arae, and its brightness varies from 5.66m to 6.18m with a period equal to the orbital period of the binary, which is 3.17 days.
The system is sometimes referred as Upsilon1 Arae (υ1 Arae), and more generally unlettered.