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G 240-72

G 240-72 (or WD 1748+708, or LHS 455, or GJ 1221) is a nearby degenerate star (white dwarf) of spectral class DQP9.0, located in constellation Draco. [1]

27 relations: Centre de données astronomiques de Strasbourg, Draco (constellation), Earth radius, Epoch (astronomy), Gliese Catalogue of Nearby Stars, Gravity of Earth, Kelvin, Kilometre, Light-year, LP 145-141, Minute and second of arc, Parallax, Parsec, Procyon, Sirius, Solar mass, Star catalogue, Stein 2051, Sun, Surface gravity, The Astronomical Journal, Van Maanen 2, White dwarf, Year, 1 petametre, 2MASS, 40 Eridani.

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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Draco (constellation)

Draco is a constellation in the far northern sky.

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Earth radius

Earth radius is the distance from the Earth's center to its surface, about.

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Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

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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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Gravity of Earth

The gravity of Earth, which is denoted by, refers to the acceleration that the Earth imparts to objects on or near its surface due to gravity.

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Kelvin

The kelvin is a unit of measure for temperature based upon an absolute scale.

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Kilometre

The kilometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: km; or) or kilometer (American spelling) is a unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world; notable exceptions are the United States and the United Kingdom where the statute mile is the official unit used.

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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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LP 145-141

LP 145-141 is a white dwarf located 15 light years from the Solar System.

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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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Parallax

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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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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Procyon

Procyon (α CMi, α Canis Minoris, Alpha Canis Minoris) is the brightest star in the constellation Canis Minor.

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Sirius

Sirius is the brightest star (in fact, a star system) in the Earth's night sky.

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Solar mass

The solar mass is a standard unit of mass in astronomy that is used to indicate the masses of other stars, as well as clusters, nebulae and galaxies.

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Star catalogue

A star catalogue, or star catalog, is an astronomical catalogue that lists stars.

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Stein 2051

Stein 2051 (Gliese 169.1, G 175-034, LHS 26/27) is a nearby binary star system, containing a red dwarf (component A) and a degenerate star (white dwarf) (component B), located in constellation Camelopardalis at 18.06 ly from Earth.

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Sun

The Sun (in Greek: Helios, in Latin: Sol) is the star at the center of the Solar System and is by far the most important source of energy for life on Earth.

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Surface gravity

The surface gravity, g, of an astronomical or other object is the gravitational acceleration experienced at its surface.

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The Astronomical Journal

The Astronomical Journal (often abbreviated AJ in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society and currently published by IOP Publishing.

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Van Maanen 2

Van Maanen 2 (van Maanen's Star) is a white dwarf.

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White dwarf

A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter.

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Year

A year is the orbital period of the Earth moving in its orbit around the Sun.

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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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2MASS

The Two Micron All-Sky Survey (2MASS) was a survey of the whole sky in three infrared wavebands around 2 micrometres (μm): J (1.25 μm), H (1.65 μm), and Ks (2.17 μm).

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40 Eridani

40 Eridani is a triple star system less than 16.5 light years away from Earth, in the constellation Eridanus.

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Redirects here:

GJ 1221.

References

[1] https://en.wikipedia.org/wiki/G_240-72

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