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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. [1]

31 relations: Annie Jump Cannon, Antonia Maury, Apparent magnitude, Arequipa, Astronomical catalog, Astronomy, Carbon star, CD-ROM, Centre de données astronomiques de Strasbourg, Durchmusterung, Edward Charles Pickering, Epoch (astronomy), EZ Canis Majoris, Harvard College Observatory, Henry Draper, NASA, Peru, Photographic magnitude, Right ascension, Slitless spectroscopy, Southern Hemisphere, Spectral line, Spectroscopy, Spectrum, Star catalogue, Stellar classification, Strasbourg, Vega, VizieR, Williamina Fleming, Wolf–Rayet star.

Annie Jump Cannon

Annie Jump Cannon (December 11, 1863 – April 13, 1941) was an American astronomer whose cataloging work was instrumental in the development of contemporary stellar classification.

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Antonia Maury

Antonia Maury (March 21, 1866–January 8, 1952) was an American astronomer who published an important early catalog of stellar spectra.

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Apparent magnitude

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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Arequipa

Arequipa is the capital and largest city of the Arequipa Region and the seat of the Constitutional Court of Peru.

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Astronomical catalog

An astronomical catalog or catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery.

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Astronomy

Astronomy is a natural science which is the study of celestial objects (such as stars, galaxies, planets, moons, asteroids, comets and nebulae), the physics, chemistry, and evolution of such objects, and phenomena that originate outside the atmosphere of Earth, including supernovae explosions, gamma ray bursts, and cosmic microwave background radiation.

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Carbon star

A carbon star is a late-type star similar to a red giant (or occasionally to a red dwarf) whose atmosphere contains more carbon than oxygen; the two elements combine in the upper layers of the star, forming carbon monoxide, which consumes all the oxygen in the atmosphere, leaving carbon atoms free to form other carbon compounds, giving the star a "sooty" atmosphere and a strikingly ruby red appearance.

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CD-ROM

A CD-ROM is a pre-pressed optical compact disc which contains data.

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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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Durchmusterung

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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Edward Charles Pickering

Edward Charles Pickering (July 19, 1846 – February 3, 1919) was an American astronomer and physicist as well as the older brother of William Henry Pickering.

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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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EZ Canis Majoris

EZ Canis Majoris (EZ CMa) is a Wolf-Rayet star in the constellation of Canis Major.

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Harvard College Observatory

The Harvard College Observatory (HCO) is an institution managing a complex of buildings and multiple instruments used for astronomical research by the Harvard University Department of Astronomy.

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Henry Draper

Henry Draper (March 7, 1837 – November 20, 1882) was an American doctor and amateur astronomer.

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NASA

The National Aeronautics and Space Administration (NASA) is the United States government agency responsible for the civilian space program as well as aeronautics and aerospace research.

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Peru

Peru (Perú; Piruw; Piruw), officially the Republic of Peru, is a country in western South America.

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Photographic magnitude

Before the advent of photometers which accurately measure the brightness of astronomical objects, the apparent magnitude of an object was obtained by taking a picture of it with a camera.

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Right ascension

Right ascension (abbreviated RA; symbol α) is the angular distance measured eastward along the celestial equator from the vernal equinox to the hour circle of the point in question.

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Slitless spectroscopy

Slitless spectroscopy is astronomical spectroscopy done without a small slit to allow only light from a small region to be diffracted.

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Southern Hemisphere

The Southern Hemisphere of Earth is the half which is south of the equator.

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Spectral line

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.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and electromagnetic radiation.

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Spectrum

A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary infinitely within a continuum.

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Star catalogue

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

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Stellar classification

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

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Strasbourg

Strasbourg (Lower Alsatian: Strossburi) is the capital and principal city of the Alsace region in north eastern France and is the official seat of the European Parliament.

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Vega

Vega (α Lyr, α Lyrae, Alpha Lyrae) is the brightest star in the constellation Lyra, the fifth brightest star in the night sky and the second brightest star in the northern celestial hemisphere, after Arcturus.

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VizieR

The VizieR Catalogue Service is an astronomical catalog service provided by Centre de données astronomiques de Strasbourg.

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Williamina Fleming

Williamina Paton Stevens Fleming (May 15, 1857 – May 21, 1911) was a Scottish astronomer.

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Wolf–Rayet star

Wolf–Rayet stars (often referred to as WR stars) are a heterogeneous set of stars with unusual spectra showing prominent broad emission lines of highly ionised helium and nitrogen or carbon.

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Redirects here:

HD Catalog, HD Catalogue, HDEC, Henry Draper Catalog, Henry Draper Extension, Henry Draper Extension Charts, Henry Draper catalog, Henry Draper catalogue.

References

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

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