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Légende du diagramme : The constellation Caelum with its bright stars and surrounding constellations. Caelum is surrounded by (going clockwise from the top): Eridanus, Horologium, Dorado, Pictor, Columba and Lepus. Caelum is a relatively small and faint constellation.

Caelum is a southern constellation and the whole constellation is visible at some point in the year from the whole southern hemisphere and from equatorial parts of the northern hemisphere. Parts of the constellation are visible from temperate regions of the northern hemisphere. The constellation is most visible in the evenings in the northern hemisphere winter and southern hemisphere summer.

The y-axis of this diagram is in degrees of declination with north as up and the x-axis is in hours of right ascension with east to the left. The sizes of the stars marked here relate to the star's apparent magnitude, a measure of its apparent brightness. The larger dots represent brighter stars. The Greek letters mark the brightest stars in the constellation. These are ranked by brightness with the brightest star being labeled alpha, the second brightest beta, etc., although this ordering is not always followed exactly. The dotted boundary lines mark the IAU's boundaries of the constellations and the solid green lines mark one of the common forms used to represent the figures of the constellations. Neither the constellation boundaries, nor the lines joining the stars appear on the sky.

Crédit du diagramme : Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope. Lien du crédit

État de la traduction du diagramme: Pas encore approuvé par un·e relecteur(rice)
Licence du diagramme : Creative Commons (CC) Attribution 4.0 International (CC BY 4.0) Creative Commons (CC) Attribution 4.0 International (CC BY 4.0) Icônes

Termes du glossaire en rapport : Ascension droite (AD) , Constellation , Coordonnées célestes , Déclinaison , Magnitude apparente
Catégories : Astronomie à l'œil nu

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