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Eta Geminorum

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Eta Geminorum (η Geminorum, abbreviated Eta Gem, η Gem), also named Propus, is a triple star system in the constellation of Gemini. [1]

50 relations: Aitken Double Star Catalogue, Algol variable, Asymptotic giant branch, Bayer designation, Binary star, Bright Star Catalogue, Castor (star), Catalog of Components of Double and Multiple Stars, Chinese constellations, Chinese language, Constellation, Crater-class cargo ship, Durchmusterung, Ecliptic, Emission nebula, Flamsteed designation, Gamma Geminorum, Gemini (constellation), Greek language, Henry Draper Catalogue, Hipparcos, IAU Working Group on Star Names, IC 443, IC 444, International Astronomical Union, Johann Friedrich Julius Schmidt, Light-year, Mercury (planet), Messier 35, Mira variable, Moon, Mu Geminorum, Nu Geminorum, Occultation, Open cluster, Persian language, Pinyin, Planet, Semiregular variable star, Sharpless catalog, Sherburne Wesley Burnham, Smithsonian Astrophysical Observatory Star Catalog, Star system, Sun, United States Navy, USS Propus (AK-132), Variable star, Venus, William Wallace Campbell, Xi Geminorum.

Aitken Double Star Catalogue

The Aitken Double Star Catalogue, or ADS, is a star catalogue of double stars.

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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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Asymptotic giant branch

The asymptotic giant branch (AGB) is a region of the Hertzsprung–Russell diagram populated by evolved cool luminous stars.

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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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Binary star

A binary star is a star system consisting of two stars orbiting around their common barycenter.

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Bright Star Catalogue

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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Castor (star)

Castor, also designated Alpha Geminorum (α Geminorum, abbreviated Alpha Gem, α Gem) is the second-brightest star in the constellation of Gemini and one of the brightest stars in the night sky.

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Catalog of Components of Double and Multiple Stars

The Catalog of Components of Double and Multiple Stars, or CCDM, is an astrometric star catalogue of double and multiple stars.

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Chinese constellations

Traditional Chinese astronomy has a system of dividing the celestial sphere into asterisms or constellations, known as "officials" (Chinese xīng guān).

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Chinese language

Chinese is a group of related, but in many cases mutually unintelligible, language varieties, forming a branch of the Sino-Tibetan language family.

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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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Crater-class cargo ship

Crater-class cargo ship is a category of freighter that was constructed for use by the United States Navy during World War II under Maritime Commission EC2-S-C1 type.

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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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The ecliptic is the circular path on the celestial sphere that the Sun follows over the course of a year; it is the basis of the ecliptic coordinate system.

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Emission nebula

An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths.

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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 Geminorum

Gamma Geminorum (γ Geminorum, abbreviated Gamma Gem, γ Gem), also named Alhena, is the third-brightest star in the constellation of Gemini.

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Gemini (constellation)

Gemini is one of the constellations of the zodiac.

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Greek language

Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.

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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 was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.

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IAU Working Group on Star Names

The International Astronomical Union (IAU) established a Working Group on Star Names (WGSN) in May 2016 to catalog and standardize proper names for stars for the international astronomical community.

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IC 443

IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a Galactic supernova remnant (SNR) in the constellation Gemini.

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IC 444

| name.

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International Astronomical Union

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

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Johann Friedrich Julius Schmidt

Johann Friedrich Julius Schmidt (25 October 1825 in Eutin, Germany – 7 February 1884 in Athens, Greece) was a German astronomer and geophysicist.

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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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Mercury (planet)

Mercury is the smallest and innermost planet in the Solar System.

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Messier 35

Messier 35 (also known as M35, or NGC 2168) is an open cluster in the constellation Gemini.

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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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The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.

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Mu Geminorum

Mu Geminorum (μ Geminorum, abbreviated Mu Gem, μ Gem) is a double star in the northern constellation of Gemini.

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Nu Geminorum

Nu Geminorum (ν Gem) is a binary, and possibly a multiple star system in the constellation Gemini.

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An occultation is an event that occurs when one object is hidden by another object that passes between it and the observer.

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Open cluster

An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age.

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Persian language

Persian, also known by its endonym Farsi (فارسی), is one of the Western Iranian languages within the Indo-Iranian branch of the Indo-European language family.

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Hanyu Pinyin Romanization, often abbreviated to pinyin, is the official romanization system for Standard Chinese in mainland China and to some extent in Taiwan.

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A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.

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Semiregular variable star

Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities.

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Sharpless catalog

The Sharpless catalog is a list of 313 HII regions (emission nebulae), intended to be comprehensive north of declination −27°.

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Sherburne Wesley Burnham

Sherburne Wesley Burnham (December 12, 1838 – March 11, 1921) was an American astronomer.

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Smithsonian Astrophysical Observatory Star Catalog

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

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Star system

A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction.

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The Sun is the star at the center of the Solar System.

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United States Navy

The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States.

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USS Propus (AK-132)

USS Propus (AK-132) was a commissioned by the U.S. Navy for service in World War II.

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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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Venus is the second planet from the Sun, orbiting it every 224.7 Earth days.

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William Wallace Campbell

William Wallace Campbell (April 11, 1862 – June 14, 1938) was an American astronomer, and director of Lick Observatory from 1901 to 1930.

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Xi Geminorum

Xi Geminorum (ξ Geminorum, abbreviated Ksi Gem, ξ Gem), also named Alzirr, is a star in the zodiac constellation of Gemini.

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Redirects here:

7 Gem, 7 Geminorum, Eta Gem, Praepes, Propus, Tejat Prior, Η Gem, Η Geminorum.


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

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