Rho Coronae Borealis (ρ CrB / ρ Coronae Borealis) is a 5th magnitude star in the constellation of Corona Borealis. It is, like our Sun, a yellow dwarf (spectral type G0 V or G2 V) and only slightly brighter. It may be much older than the Sun, 10,000 million years old. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... 2000 (MM) was a leap year starting on Saturday of the Gregorian calendar. ... This article or section does not adequately cite its references or sources. ... Corona Borealis (Latin for northern crown) is a small northern constellation whose main stars form a semicircular arc. ... 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. ... 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. ... 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. ... Corona Borealis (Latin for northern crown) is a small northern constellation whose main stars form a semicircular arc. ... “Sol” redirects here. ... Large solar flare recorded by SOHO EIT304 instrument in the ultraviolet. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequenly refined in terms of other characteristics. ...

In 1997 the AFOE planet search team announced the discovery of an extrasolar planet (Rho Coronae Borealis b) orbiting the star. Furthermore, in 1997 the star was observed radiating excessively in certain infrared wavelengths indicating a circumstellar disk around the star, similar to the Kuiper belt in our Solar system. Year 1997 (MCMXCVII) was a common year starting on Wednesday (link will display full 1997 Gregorian calendar). ... An extrasolar planet, or exoplanet, is a planet beyond the Solar System. ... The planet, one of the first discovered, is designated as ρ Coronae Borealis b. ... Image of two girls in mid-infrared (thermal) light (false-color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. ... The wavelength is the distance between repeating units of a wave pattern. ... A protoplanetary disc (also protoplanetary disk, proplyd) is an accretion disc surrounding a T Tauri star. ... The Kuiper belt, derived from data from the Minor Planet Center. ... Major features of the Solar System (not to scale; from left to right): Pluto, Neptune, Uranus, Saturn, Jupiter, the asteroid belt, the Sun, Mercury, Venus, Earth and its Moon, and Mars. ...

A stellar companion has been listed for ρ Coronae Borealis in the Washington Visual Double Star Catalog, but no further information is available on it. It may be just a line-of-sight optical companion. When two stars are so nearly in the same direction as seen from Earth that they appear to be a single star to the naked eye but may be separated by the use of telescopes, they are referred to as a double star. ...

External links

• SIMBAD star entry