Diagram caption: The constellation Grus with its bright stars and surrounding constellations. Grus is surrounded by (going clockwise from the top): Piscis Austrinus, Microscopium, Indus, Tucana, Phoenix and Sculptor.

Grus is a southern constellation and thus the whole constellation is visible at some point in the year from the whole southern hemisphere at some point in the year. The whole constellation is also visible from equatorial and some temperate regions of the northern hemisphere. Grus is best viewed in the evening in the northern hemisphere autumn and southern hemisphere spring.

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.

Diagram credit: Adapted by the IAU Office of Astronomy for Education from the original by the IAU and Sky & Telescope. Credit Link

Diagram translation status: Not yet approved by a reviewer
Related glossary terms: Ascension droite (AD) , Constellation , Coordonnées célestes , Déclinaison , Magnitude apparente
Categories: Naked Eye Astronomy

Diagram license: Creative Commons Attribution 4.0 International (CC BY 4.0) Creative Commons Attribution 4.0 International (CC BY 4.0) icons