Cor Caroli (α CVn / α Canum Venaticorum / Alpha Canum Venaticorum) is the brightest star in the northern constellation Canes Venatici. The name Cor Caroli means Charles' heart, and was named most likely by Edmond Halley in honour of either Charles I, who was executed or Charles II of England, his son, who was restored to the throne after the interregnum following his father's death. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... It has been suggested that this article or section be merged into Julian epoch. ... This article or section does not adequately cite its references or sources. ... Canes Venatici (Latin for Hunting dogs) is a small northern constellation that was introduced by Johannes Hevelius in the 17th century. ... Equatorial Coordinates Right ascension (abbrev. ... In astronomy, declination (abbrev. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... This article is in need of attention from an expert on the subject. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one year. ... A parsec is the distance from the Earth to an astronomical object which has a parallax angle of one arcsecond. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... A star catalogue, or star catalog, is an astronomical catalog that lists stars. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Henry Draper Catalogue is an astronomy catalogue with astrometric and spectroscopic data about more than 225,000 stars. ... In astronomy, many stars are referred to simply by catalogue numbers. ... Fifth Fundamental Catalogue is a glossary of positions of stars. ... The Hipparcos and Tycho Catalogues (Tycho-1) are the primary products of the European Space Agencys astrometric mission, Hipparcos. ... In astronomy, many stars are referred to simply by catalogue numbers. ... A star catalogue, or star catalog, is an astronomical catalog that lists stars. ... Alpha (uppercase Α, lowercase α) is the first letter of the Greek alphabet. ... STAR is an acronym for: Organizations Society of Ticket Agents and Retailers], the self-regulatory body for the entertainment ticket industry in the UK. Society for Telescopy, Astronomy, and Radio, a non-profit New Jersey astronomy club. ... This article or section does not adequately cite its references or sources. ... Canes Venatici (Latin for Hunting dogs) is a small northern constellation that was introduced by Johannes Hevelius in the 17th century. ... Portrait of Edmond Halley painted around 1687 by Thomas Murray (Royal Society, London) Portrait of Edmond Halley Bust of Edmond Halley in the Museum of the Royal Greenwich Observatory Edmond Halley FRS (sometimes Edmund, November 8, 1656 – January 14, 1742) was an English astronomer, geophysicist, mathematician, meteorologist, and physicist. ... Charles I (19 November 1600 – 30 January 1649) was King of England, King of Scotland, and King of Ireland from 27 March 1625 until his execution in 1649. ... Charles II (29 May 1630 – 6 February 1685) was the King of England, King of Scots, and King of Ireland from 30 January 1649 (de jure) or 29 May 1660 (de facto) until his death. ... An interregnum is a period between monarchs, between popes of the Roman Catholic Church, emperors of Holy Roman Empire, polish kings (elective monarchy) or between consuls of the Roman Republic. ...

Cor Caroli is a binary star which has a combined apparent magnitude of +2.89. The two stars are 19.6 arcseconds apart on the sky and are easily resolved in small telescopes. It is approximately 110 light years from Earth. Artists impression of a binary system consisting of a black hole, with an accretion disc around it, and a main sequence star. ... The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 ≈ 7. ... A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one year. ... Adjectives: Terrestrial, Terran, Telluric, Tellurian, Earthly Atmosphere Surface pressure: 101. ...

The main star, α² Canum Venaticorum, is the prototype of a class of variable stars, the so-called α² Canum Venaticorum stars. These stars have a strong magnetic field, which is believed to produce sunspots of enormous extent. Due to these sunspots the brightness of α² Canum Venaticorum stars varies considerably during their rotation. Most stars are of almost constant luminosity. ... Alpha² Canum Venaticorum variables are main sequence variable stars of spectral class B8p to A7p. ... This template is misplaced. ...

The brightness of α² Canum Venaticorum varies between +2.84 magnitude and +2.94 with a period of 5.47 days. Its spectral type is A0. The companion, α¹ Canum Venaticorum, of spectral type F0, is considerably fainter at +5.5 magnitude. The apparent magnitude (m) of a star, planet or other celestial body is a measure of its apparent brightness as seen by an observer on Earth. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ...

Cor Caroli marks the northern vertex of the Diamond of Virgo asterism. The Great Diamond or Virgins Diamond/Diamond of Virgo is an asterism. ... In astronomy, an asterism is a pattern of stars seen in Earths sky which is not an official constellation. ...