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21 relations: Astronomical unit, Binary star, Draco (constellation), Durchmusterung, Flare star, Friedrich Georg Wilhelm von Struve, Galactic Center, Galactic plane, Gliese Catalogue of Nearby Stars, Henry Draper Catalogue, Hipparcos, Light-year, List of nearest stars and brown dwarfs, Milky Way, Orbital eccentricity, Proper motion, Red dwarf, Star catalogue, Stellar parallax, Variable star, X-ray astronomy.
Astronomical unit
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
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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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Draco (constellation)
Draco is a constellation in the far northern sky.
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Durchmusterung
In astronomy, Durchmusterung or Bonner Durchmusterung (BD), is the comprehensive astrometric star catalogue of the whole sky, compiled by the Bonn Observatory (Germany) from 1859 to 1903.
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Flare star
A flare star is a variable star that can undergo unpredictable dramatic increases in brightness for a few minutes.
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Friedrich Georg Wilhelm von Struve
Friedrich Georg Wilhelm von Struve (Василий Яковлевич Струве, trans. Vasily Yakovlevich Struve; 15 April 1793 –) was a German-Russian astronomer and geodesist from the famous Struve family.
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Galactic Center
The Galactic Center is the rotational center of the Milky Way.
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Galactic plane
The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies.
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Gliese Catalogue of Nearby Stars
The Gliese Catalogue of Nearby Stars is a modern star catalogue of stars located within 25 parsecs (81.54 ly) of the Earth.
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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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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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List of nearest stars and brown dwarfs
The following two lists include all the known stars and brown dwarfs that are within of the Sun, or were/will be within in the astronomically near past or future.
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Milky Way
The Milky Way is the galaxy that contains our Solar System.
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Orbital eccentricity
The orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle.
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Proper motion
Proper motion is the astronomical measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the Solar System, compared to the abstract background of the more distant stars.
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Red dwarf
A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.
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Star catalogue
A star catalogue (Commonwealth English) or star catalog (American English), is an astronomical catalogue that lists stars.
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Stellar parallax
Stellar parallax is the apparent shift of position of any nearby star (or other object) against the background of distant objects.
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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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X-ray astronomy
X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects.
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Redirects here:
Gliese 725, Struve 2398 A, Struve 2398 AB, Struve 2398 B, Struve 2398 Star System, Σ 2398.
References
[1] https://en.wikipedia.org/wiki/Struve_2398
