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Encyclopedia > Flamsteed designation

Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek letters. Each star is assigned a number and the Latin genitive of the constellation it lies in (see List of constellations for a list of constellations and the genitive forms of their names). The Pleiades star cluster A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ... Many of the brighter stars are given names which are known as Bayer designations. ... The genitive case is a grammatical case that indicates a relationship, primarily one of possession, between the noun in the genitive case and another noun. ... Orion is a remarkable constellation, visible from most places on the globe (but not always the whole year long). ... From the dawn of time, humans observed the sky and grouped stars into patterns or constellations. ...


The numbers were originally assigned in order of increasing right ascension within each constellation, but due to the effects of precession they are now slightly out of order in some places. This method of designating stars first appeared in a preliminary version of John Flamsteed's Historia coelestis Britannica which was published by Edmond Halley and Isaac Newton in 1712 without Flamsteed's approval. The final version of Flamsteed's catalogue published in 1725 after his death omitted any number designations altogether. Right ascension (RA; symbol α: Greek letter alpha; celestial longitude) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... Orion is a remarkable constellation, visible from most places on the globe (but not always the whole year long). ... Precession refers to a change in the direction of the axis of a rotating object. ... John Flamsteed - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... Edmond Halley (sometimes Edmund, October 29, 1756 – January 14, 1742) was an English astronomer, geophysicist, mathematician, meteorologist, and physicist. ... Sir Isaac Newton, PRS (4 January [O.S. 25 December 1642] 1643 – 31 March [O.S. 20 March] 1727) was an English physicist, mathematician, astronomer, alchemist, inventor and natural philosopher who is regarded by many as the most influential scientist in history. ... // Events Treaty of Aargau signed between Catholic and Protestants. ... Events February 8 - Catherine I became empress of Russia February 20 - The first reported case of white men scalping Native Americans takes place in New Hampshire colony. ...


The designations gained popularity throughout the eighteenth century, and are now commonly used when no Bayer designation exists; however, where a Bayer designation does exist for a star it is used almost exclusively and the Flamsteed designation is almost never used. Examples of well-known stars which are usually referred to by their Flamsteed numbers include 51 Pegasi (see Extrasolar planet), and 61 Cygni (see Parallax). 51 Pegasi (Flamsteed designation, HIP 113357 in the Hipparcos Catalogue, HD 217014 in the Henry Draper Catalogue) is the name of a Sun-like star 14. ... Infrared image of the star GQ Lupi (A) orbited by a planet (b) at a distance of approximately 20 times the distance between Jupiter and our Sun. ... 61 Cygni is a star in the constellation Cygnus. ... Parallax (Greek: παραλλαγή (parallagé) = alteration) is the change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer. ...


There are examples of stars bearing Flamsteed designations for constellations in which they do not lie, just as there are for Bayer designations, because of the compromises that had to be made when the modern constellation boundaries were drawn up. It should also be noted that Flamsteed's catalogue covered only the stars visible from Great Britain, and therefore stars of the far southern constellations have no Flamsteed numbers. (Two exceptions are the globular cluster 47 Tucanae and the nearby star 82 Eridani.) Globular Cluster 47 Tucanae (also known as 47 Tucanae, Globular Cluster NGC 104, or NGC 104) is a globular cluster in the Tucana constellation. ... 82 Eridani is a star about 20. ...


Some entries in Flamsteed's catalog are errors: for instance, Flamsteed observed Uranus in 1690 but did not recognized it as a planet and it entered his catalog as "34 Tauri". Atmospheric characteristics Atmospheric pressure 120 kPa Hydrogen 83% Helium 15% Methane 1. ... Events Giovanni Domenico Cassini observes differential rotation within Jupiters atmosphere. ... A planet is generally considered to be a relatively large mass of accreted matter in orbit around a star that is not a star itself. ...


See also


  Results from FactBites:
 
Flamsteed designation - definition of Flamsteed designation in Encyclopedia (261 words)
Flamsteed designations for stars are similar to Bayer designations, except that they use numbers instead of Greek letters.
This method of designating stars first appeared in a preliminary version of John Flamsteed's Historia coelestis Britannica which was published by Edmond Halley and Isaac Newton in 1712 without Flamsteed's approval.
There are examples of stars bearing Flamsteed designations for constellations in which they do not lie, just as there are for Bayer designations, because of the compromises that had to be made when the modern constellation boundaries were drawn up.
Bayer designation - Wikipedia, the free encyclopedia (616 words)
These designations, which were introduced by Johann Bayer in his star atlas Uranometria (named after Urania) in 1603, consist of a Greek letter followed by the genitive (in Latin) of the name of the constellation in which the star lies.
And there are even cases where a star has a designation for a constellation in which it does not lie (according to the modern constellation boundaries).
Note that uppercase Latin Bayer designations never went beyond Q, and names such as R Leporis and W Ursae Majoris are variable star designations, not Bayer designations.
  More results at FactBites »

 
 

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