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46 relations: Absolute magnitude, Algol variable, Alpha Equulei, Apparent magnitude, Bayer designation, Beta Cephei variable, Beta Equulei, Binary star, Constellation, Cosmic distance ladder, Declination, Delta Equulei, Double star, Epsilon Equulei, Equuleus, Exoplanet, Flamsteed designation, Gamma Equulei, HD 199942, HD 200661, HD 200964, HD 201298, HD 201507, HD 202951, HD 203842, Henry Draper Catalogue, Hipparcos, Lambda Equulei, Light-year, Lists of stars by constellation, Mira variable, Proper names (astronomy), R Equulei, Rapidly oscillating Ap star, Right ascension, Slow irregular variable, Star, Stellar classification, Transit (astronomy), U Equulei, Variable star, Variable star designation, Zeta Equulei, 4 Equulei, 6 Equulei, 9 Equulei.
Absolute magnitude
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
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Algol variable
Algol variables or Algol-type binaries are a class of eclipsing binary stars that are related to the prototype member of this class, β Persei (Beta Persei, Algol) from an evolutionary point of view.
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Alpha Equulei
Alpha Equulei (α Equulei, abbreviated Alpha Equ, α Equ), also named Kitalpha, is a star in the constellation of Equuleus.
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Apparent magnitude
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
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Bayer designation
A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name.
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Beta Cephei variable
Beta Cephei variables, also known as Beta Canis Majoris stars, are variable stars that exhibit small rapid variations in their brightness due to pulsations of the stars' surfaces, thought due to the unusual properties of iron at temperatures of 200,000 K in their interiors.
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Beta Equulei
Beta Equulei, Latinized from β Equulei, is the Bayer designation for a solitary star in the northern constellation of Equuleus.
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Binary star
A binary star is a star system consisting of two stars orbiting around their common barycenter.
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Constellation
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
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Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects.
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Declination
In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.
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Delta Equulei
Delta Equulei, Latinized from δ Equulei, is the second brightest star in the constellation Equuleus.
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Double star
In observational astronomy, a double star or visual double is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope.
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Epsilon Equulei
Epsilon Equulei, Latinized from ε Equulei, is a star system of apparent magnitude +5.23 in the constellation of Equuleus.
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Equuleus
Equuleus is a constellation.
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Exoplanet
An exoplanet or extrasolar planet is a planet outside our solar system.
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Flamsteed designation
A Flamsteed designation is a combination of a number and constellation name that uniquely identifies most naked eye stars in the modern constellations visible from southern England.
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Gamma Equulei
Gamma Equulei, Latinized from γ Equulei, is a double star in the northern constellation of Equuleus.
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HD 199942
HD 199942 (HR 8038) is an A-type main sequence star in the constellation of Equuleus.
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HD 200661
HD 200661 is a K-type star in the constellation Equuleus.
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HD 200964
HD 200964 is a 7th magnitude star located approximately 223 light-years away in the constellation of Equuleus.
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HD 201298
HD 201298 is a K-type star in the constellation of Equuleus.
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HD 201507
HD 201507 is a F-type subgiant in Equuleus.
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HD 202951
HD 202951 is a K-type star (which is also a variable star, is) located in the constellation of Equuleus.
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HD 203842
HD 203842 is a F-type star in the constellation of Equuleus.
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Henry Draper Catalogue
The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars.
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Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
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Lambda Equulei
λ Equulei (Latinised to Lambda Equulei, abbreviated to λ Equ or Lambda Equ) is a double star system in the constellation of Equuleus.
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Light-year
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.
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Lists of stars by constellation
All stars but one can be associated with an IAU constellation.
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Mira variable
Mira variables ("Mira", Latin, adj. - feminine form of adjective "wonderful"), named for the prototype star Mira, are a class of pulsating variable stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths.
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Proper names (astronomy)
Some astronomical objects have proper names (common names, popular names, traditional names); as opposed to catalogue numbers or other systematic designations.
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R Equulei
R Equulei is a M-type star, while also a Mira variable, is located in the constellation Equuleus.
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Rapidly oscillating Ap star
Rapidly oscillating Ap stars (roAp stars) are a subtype of the Ap star class that exhibit short-timescale rapid photometric or radial velocity variations.
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Right ascension
Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.
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Slow irregular variable
A slow irregular variable (ascribed the GCVS types L, LB and LC) is a variable star that exhibit no or very poorly defined periodicity in their slowly changing light emissions.
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Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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Transit (astronomy)
In astronomy, a transit or astronomical transit is the phenomenon of at least one celestial body appearing to move across the face of another celestial body, hiding a small part of it, as seen by an observer at some particular vantage point.
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U Equulei
U Equulei (U Equ / IRAS 20547 +0247) is a variable star in the Equuleus constellation with an apparent magnitude of +14.50 in the B band.
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Variable star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.
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Variable star designation
Variable stars are designated using a variation on the Bayer designation format of an identifying label (as described below) combined with the Latin genitive of the name of the constellation in which the star lies.
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Zeta Equulei
ζ Equulei (Latinised to Zeta Equulei, abbreviated to ζ Equ or Zeta Equ) is a single star located in the small northern constellation of Equuleus.
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4 Equulei
4 Equulei is a binary star system in the constellation of Equuleus, located about 3° to the east of Alpha Equulei.
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6 Equulei
6 Equulei is an A-type main sequence star in the constellation of Equuleus with an apparent magnitude of 6.07.
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9 Equulei
9 Equulei is a M-type star in the constellation Equuleus.
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References
[1] https://en.wikipedia.org/wiki/List_of_stars_in_Equuleus
