Corona Borealis

1730

The Wardaman people of northern Australia held the constellation to be a gathering point for Men's Law, Women's Law and Law of both sexes come together and consider matters of existence. === Later references === Corona Borealis was renamed Corona Firmiana in honour of the Archbishop of Salzburg in the 1730 Atlas Mercurii Philosophicii Firmamentum Firminianum Descriptionem by Corbinianus Thomas, but this was not taken up by subsequent cartographers.

1866

An outburst of T Coronae Borealis was first recorded in 1866; its second recorded outburst was in February 1946.

1922

The three-letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is "CrB".

1923

Lovecraft, published in 1923; it is the object of fear of one of the protagonists in the short story.

1930

The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined by a polygon of eight segments (illustrated in infobox).

1946

Normally of magnitude 10, it last flared up to magnitude 2 in 1946.

An outburst of T Coronae Borealis was first recorded in 1866; its second recorded outburst was in February 1946.

Located around 1946 light-years distant, it shines with a luminosity 16,643 times that of the Sun and has a surface temperature of 3033 K.

1990

Discovered in 1990, UW Coronae Borealis is a low-mass X-ray binary system composed of a star less massive than the Sun and a neutron star surrounded by an accretion disk that draws material from the companion star.

1997

Roughly the size of Jupiter, it completes an orbit around its star every three days. The discovery of a Jupiter-sized planetary companion was announced in 1997 via analysis of the radial velocity of Rho Coronae Borealis, a yellow main sequence star and Solar analog of spectral type G0V, around 57 light-years distant from Earth.

2001

No planet has been found, but a brown dwarf companion about 63 times as massive as Jupiter with a spectral type of L8 was discovered at a distance of 3640 AU from the pair in 2001. === Deep-sky objects === Corona Borealis contains few galaxies observable with amateur telescopes.

2002

Finnish band Cadacross released an album titled Corona Borealis in 2002. == Notes == == References == === Cited texts === ==External links== Warburg Institute Iconographic Database (over 140 medieval and early modern images of Corona Borealis) Constellations Constellations listed by Ptolemy Northern constellations

2005

The spectrum of Epsilon Coronae Borealis was analysed for seven years from 2005 to 2012, revealing a planet around 6.7 times as massive as Jupiter () orbiting every 418 days at an average distance of around 1.3 AU.

2006

In 2006 the [Jupiter] exoplanet XO-1b was discovered orbiting XO-1 by the transit method using the XO Telescope.

2010

Discovered by the Doppler method in 2010, it takes 176 days to complete an orbit.

2012

The spectrum of Epsilon Coronae Borealis was analysed for seven years from 2005 to 2012, revealing a planet around 6.7 times as massive as Jupiter () orbiting every 418 days at an average distance of around 1.3 AU.




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