12 relations: Apparent magnitude, Constellation, Corona Borealis, Durchmusterung, Henry Draper Catalogue, Hipparcos, John Birmingham (astronomer), Nova, Publications of the Astronomical Society of the Pacific, Smithsonian Astrophysical Observatory Star Catalog, White dwarf, 2MASS.
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.
In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU).
New!!: T Coronae Borealis and Constellation ·
Corona Borealis is a small constellation in the Northern Celestial Hemisphere.
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.
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.
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
New!!: T Coronae Borealis and Hipparcos ·
John Birmingham (1816–1884) was an Irish astronomer, amateur geologist, polymath and poet.
A nova (plural novae or novas) is a cataclysmic nuclear explosion on a white dwarf, which causes a sudden brightening of the star.
New!!: T Coronae Borealis and Nova ·
Publications of the Astronomical Society of the Pacific is a monthly scientific journal which publishes astronomy research and review papers, instrumentation papers and dissertation summaries.
The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter.
New!!: T Coronae Borealis and White dwarf ·
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!!: T Coronae Borealis and 2MASS ·