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26 relations: Absolute magnitude, Apparent magnitude, Astrometry, Auriga (constellation), Bright Star Catalogue, Constellation, Distance, Earth, Eugène Joseph Delporte, Flamsteed designation, Giant star, Henry Draper Catalogue, International Astronomical Union, International Celestial Reference System, John Flamsteed, Light-year, Metre per second, Minute and second of arc, Parallax, Parsec, Perseus (constellation), Radial velocity, SIMBAD, Smithsonian Astrophysical Observatory Star Catalog, Star, Stellar classification.

Absolute magnitude is the measure of intrinsic brightness of a celestial object.

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The apparent magnitude (m) of a celestial object is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere.

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Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.

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Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations.

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The Bright Star Catalogue, also known as the Yale Catalogue of Bright Stars or Yale Bright Star Catalogue, is a star catalogue that lists all stars of stellar magnitude 6.5 or brighter, which is roughly every star visible to the naked eye from Earth.

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In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU).

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Distance is a numerical description of how far apart objects are.

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Earth (also the world, in Greek: Gaia, or in Latin: Terra), is the third planet from the Sun, the densest planet in the Solar System, the largest of the Solar System's four terrestrial planets, and the only astronomical object known to accommodate life.

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Eugène Joseph Delporte (10 January 1882–19 October 1955) was a Belgian astronomer born in Genappe.

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Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek and Roman letters.

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A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.

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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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The International Astronomical Union (IAU; Union astronomique internationale, UAI) is a collection of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.

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The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).

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John Flamsteed FRS (19 August 1646 – 31 December 1719) was an English astronomer and the first Astronomer Royal.

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A light-year (abbreviation: ly), sometimes written light year, is a unit of length used informally to express astronomical distances.

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Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds.

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A minute of arc (MOA), arcminute (arcmin) or minute arc is a unit of angular measurement equal to one-sixtieth of one degree.

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Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.

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A parsec (symbol: pc) is a unit of length used to measure the astronomically large distances to objects outside the Solar System.

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Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky.

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The radial velocity of an object with respect to a given point is the rate of change of the distance between the object and the point.

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SIMBAD (the Set of Identifications, Measurements, and Bibliography for Astronomical Data) is an astronomical database of objects beyond the Solar System.

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The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.

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A star is a luminous sphere of plasma held together by its own gravity.

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In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

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[1] https://en.wikipedia.org/wiki/1_Aurigae

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