Henry Draper Catalogue and Sirius

Shortcuts: Differences, Similarities, Jaccard Similarity Coefficient, References.

Difference between Henry Draper Catalogue and Sirius

Henry Draper Catalogue vs. Sirius

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. Sirius (a romanization of Greek Σείριος, Seirios,."glowing" or "scorching") is a star system and the brightest star in the Earth's night sky.

Apparent magnitude

The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.

Apparent magnitude and Henry Draper Catalogue · Apparent magnitude and Sirius · See more »

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.

Centre de données astronomiques de Strasbourg and Henry Draper Catalogue · Centre de données astronomiques de Strasbourg and Sirius · See more »

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.

Durchmusterung and Henry Draper Catalogue · Durchmusterung and Sirius · See more »

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.

Epoch (astronomy) and Henry Draper Catalogue · Epoch (astronomy) and Sirius · See more »

Southern Hemisphere

The Southern Hemisphere is the half of Earth that is south of the Equator.

Henry Draper Catalogue and Southern Hemisphere · Sirius and Southern Hemisphere · See more »

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.

Henry Draper Catalogue and Spectral line · Sirius and Spectral line · See more »

Star catalogue

A star catalogue (Commonwealth English) or star catalog (American English), is an astronomical catalogue that lists stars.

Henry Draper Catalogue and Star catalogue · Sirius and Star catalogue · See more »

Stellar classification

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

Henry Draper Catalogue and Stellar classification · Sirius and Stellar classification · See more »

Vega

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

Henry Draper Catalogue and Vega · Sirius and Vega · See more »