Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Free
Faster access than browser!
And Ads-free!
New! » Create account

P Cygni (34 Cyg) is a variable star in the constellation Cygnus. [1]

48 relations: American Association of Variable Star Observers, Apparent magnitude, Astronomical spectroscopy, Astronomische Gesellschaft Katalog, B-type main-sequence star, Bayer designation, Binary star, Blueshift, Boss General Catalogue, Bright Star Catalogue, Catalogue of rotational velocities of the stars, Constellation, Cygnus (constellation), Durchmusterung, Flamsteed designation, General Catalogue of Stellar Radial Velocities, Gravitational energy, Guide Star Catalog, H-alpha, Henry Draper Catalogue, Hipparcos, Hypergiant, Johann Bayer, JP11, Light-year, Luminous blue variable, Mass transfer, Milky Way, Nova, Orbit, Orbital eccentricity, Parsec, PPM Star Catalogue, RAFGL, Redshift, Smithsonian Astrophysical Observatory Star Catalog, SN 2006gy, Solar mass, Spectral line, Star catalogue, Stellar classification, Stellar wind, Supernova, TD1 Catalog of Stellar Ultraviolet Fluxes, Uranometria, Variable star, Willem Blaeu, 2MASS.

Since its founding in 1911, the American Association of Variable Star Observers (AAVSO) has coordinated, collected, evaluated, analyzed, published, and archived variable star observations made largely by amateur astronomers and makes the records available to professional astronomers, researchers, and educators.

New!!: P Cygni and American Association of Variable Star Observers · See more »

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.

New!!: P Cygni and Apparent magnitude · See more »

Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects.

New!!: P Cygni and Astronomical spectroscopy · See more »

The Astronomische Gesellschaft Katalog (AGK) is an astrometric star catalogue.

New!!: P Cygni and Astronomische Gesellschaft Katalog · See more »

A B-type main-sequence star (B V) is a main-sequence (hydrogen-burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. B-type stars are extremely luminous and blue.

New!!: P Cygni and B-type main-sequence star · See more »

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.

New!!: P Cygni and Bayer designation · See more »

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

New!!: P Cygni and Binary star · See more »

A blueshift is any decrease in wavelength, with a corresponding increase in frequency, of an electromagnetic wave; the opposite effect is referred to as redshift.

New!!: P Cygni and Blueshift · See more »

Boss General Catalogue (GC, sometimes General Catalogue) is an astronomical catalogue containing 33,342 stars.

New!!: P Cygni and Boss General Catalogue · See more »

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.

New!!: P Cygni and Bright Star Catalogue · See more »

Catalogue of rotational velocities of the stars is the name for catalogue of projected stellar rotation, publushed in 1982 by Uesugi, A. and Fukuda, I.

New!!: P Cygni and Catalogue of rotational velocities of the stars · See more »

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

New!!: P Cygni and Constellation · See more »

Cygnus is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan.

New!!: P Cygni and Cygnus (constellation) · See more »

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.

New!!: P Cygni and Durchmusterung · See more »

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

New!!: P Cygni and Flamsteed designation · See more »

The General Catalogue of Stellar Radial Velocities is a star catalogue which lists radial velocities for 15,107 stars.

New!!: P Cygni and General Catalogue of Stellar Radial Velocities · See more »

Gravitational energy is potential energy associated with the gravitational field.

New!!: P Cygni and Gravitational energy · See more »

The Guide Star Catalog (GSC) is also known as the Hubble Space Telescope, Guide Catalog (HSTGC).

New!!: P Cygni and Guide Star Catalog · See more »

H-alpha (Hα) is a specific deep-red visible spectral line in the Balmer series created by hydrogen with a wavelength of 656.28 nm, which occurs when a hydrogen electron falls from its third to second lowest energy level.

New!!: P Cygni and H-alpha · See more »

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.

New!!: P Cygni and Henry Draper Catalogue · See more »

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

New!!: P Cygni and Hipparcos · See more »

A hypergiant (luminosity class 0 or Ia+) is a star with an enormous luminosity showing signs of a very high rate of mass loss.

New!!: P Cygni and Hypergiant · See more »

Johann Bayer (1572 – 7 March 1625) was a German lawyer and uranographer (celestial cartographer).

New!!: P Cygni and Johann Bayer · See more »

JP11 is a star catalog containing about 4000 objects.

New!!: P Cygni and JP11 · See more »

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

New!!: P Cygni and Light-year · See more »

Luminous blue variables (LBVs) are massive evolved stars that show unpredictable and sometimes dramatic variations in both their spectra and their brightness.

New!!: P Cygni and Luminous blue variable · See more »

Mass transfer is the net movement of mass from one location, usually meaning a stream, phase, fraction or component, to another.

New!!: P Cygni and Mass transfer · See more »

The Milky Way is the galaxy that contains our Solar System.

New!!: P Cygni and Milky Way · See more »

A nova (plural novae or novas) is a cataclysmic nuclear explosion on a white dwarf, which causes a sudden brightening of the star.

New!!: P Cygni and Nova · See more »

In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the Solar System.

New!!: P Cygni and Orbit · See more »

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.

New!!: P Cygni and Orbital eccentricity · See more »

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

New!!: P Cygni and Parsec · See more »

The PPM Star Catalogue (Positions and Proper Motions Star Catalogue) is the successor of the SAO Catalogue.

New!!: P Cygni and PPM Star Catalogue · See more »

RAFGL, the "Revised Air Force Geophysical Laboratory" (S.D. Price and T.L. Murdock, 1983), is a four-color infrared sky survey catalog.

New!!: P Cygni and RAFGL · See more »

In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.

New!!: P Cygni and Redshift · See more »

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

New!!: P Cygni and Smithsonian Astrophysical Observatory Star Catalog · See more »

SN 2006gy was an extremely energetic supernova, sometimes referred to as a hypernova or quark-nova, that was discovered on September 18, 2006.

New!!: P Cygni and SN 2006gy · See more »

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.

New!!: P Cygni and Solar mass · See more »

A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.

New!!: P Cygni and Spectral line · See more »

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

New!!: P Cygni and Star catalogue · See more »

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

New!!: P Cygni and Stellar classification · See more »

A stellar wind is a flow of gas ejected from the upper atmosphere of a star.

New!!: P Cygni and Stellar wind · See more »

A supernova is a stellar explosion that briefly outshines an entire galaxy, radiating as much energy as the Sun or any ordinary star is expected to emit over its entire life span, before fading from view over several weeks or months.

New!!: P Cygni and Supernova · See more »

In 1978, the TD1 Stellar Ultraviolet Flux Survey cataloged the ultraviolet flux of unreddened stars down to the 10th visual magnitude.

New!!: P Cygni and TD1 Catalog of Stellar Ultraviolet Fluxes · See more »

Uranometria is the short title of a star atlas produced by Johann Bayer.

New!!: P Cygni and Uranometria · See more »

A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.

New!!: P Cygni and Variable star · See more »

Willem Janszoon Blaeu (157121 October 1638), also abbreviated to Willem Jansz.

New!!: P Cygni and Willem Blaeu · See more »

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).

New!!: P Cygni and 2MASS · See more »

Redirects here:

34 Cygni, P Cygni star.

References

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

OutgoingIncoming
Hey! We are on Facebook now! »