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Gliese 251

Gliese 251 is a nearby red dwarf star of spectral type M4.0, located in constellation Gemini at 18.22 light-years from Earth. [1]

12 relations: Centre de données astronomiques de Strasbourg, Gemini (constellation), Light-year, Max Wolf, Minute and second of arc, Parsec, Proper motion, Red dwarf, SIMBAD, Stellar classification, The Astrophysical Journal, 1 petametre.

Centre de données astronomiques de Strasbourg

The Centre de données astronomiques de Strasbourg (CDS; English translation: Strasbourg Astronomical Data Center) is a data hub which collects and distributes astronomical information.

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Gemini (constellation)

Gemini is one of the constellations of the zodiac.

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Light-year

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

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Max Wolf

Maximilian Franz Joseph Cornelius Wolf (June 21, 1863 – October 3, 1932) was a German astronomer and a pioneer in the field of astrophotography.

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Minute and second of arc

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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Parsec

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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Proper motion

Proper motion is the astronomical measure of the observed changes in apparent positions of stars in the sky as seen from the center of mass of the Solar System, as compared to the imaginary fixed background of the more distant stars.

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Red dwarf

A red dwarf is a small and relatively cool star on the main sequence, either late K or M spectral type.

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SIMBAD

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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Stellar classification

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

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The Astrophysical Journal

The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.

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1 petametre

To help compare different distances this page lists lengths starting at 1015 m (1 Pm or 1,000,000 million km or 6685 astronomical units (AU) or 0.11 light years).

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References

[1] https://en.wikipedia.org/wiki/Gliese_251

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