This page gathers various maps of the celestial sphere with primary focus on the constellation boundaries. Background information about constellation boundaries is available here.

Reproductions of the maps from Delporte's book

The maps in this series attempt to reproduce those included in Eugène Delporte's book Délimitation Scientifique des Constellations as faithfully as practical.

This file contains reproductions of the large maps of the northern and southern hemispheres that conclude Delporte's book. They include the coordinates of the constellation boundaries. They use azimuthal equidistant projections on tangent planes at the poles. The thumbnails below link to individual maps.

Delporte Constellation Boundaries - Northern
            Hemisphere Delporte Constellation Boundaries - Southern Hemisphere
Northern Hemisphere Southern Hemisphere

This file contains the twenty-six maps covering the celestial sphere; the thumbnails below link to individual maps. Felice Stoppa's site has images of the originals, see this example. I have used the stereographic projection onto the tangent plane to the celestial sphere at the center of the map from the opposite point. All the maps are drawn at the same scale, unlike the book's, where the ones centered at latitude ±50° appear to use a different scale from the ones centered at ±10° (and even different scale factors along x and y). The equatorial coordinate system corresponds to the equinox of B1875.0. For the stars, I have used the Bright Star Catalogue, 5th Revised Ed., and precessed the coordinates back to B1875.0. To make the stars more recognizable, I have added asterisms according to the constellation maps at the IAU site.

1N 2N 3N 4N 5N 6N 7N
1N 2N 3N 4N 5N 6N 7N
8N 9N 10N 11N 12N 13N
8N 9N 10N 11N 12N 13N
1S 2S 3S 4S 5S 6S 7S
1S 2S 3S 4S 5S 6S 7S
8S 9S 10S 11S 12S 13S
8S 9S 10S 11S 12S 13S

Color maps

These maps provide views of the celestial sphere in the six directions of the cartesian axes of the equatorial coordinate system. This file contains all six maps.

North South Aries Cancer Libra Capricorn
North view South view Aries view Cancer view Libra view Capricorn view

Acknowledgment. This research has made use of the VizieR catalogue access tool, CDS, Strasbourg, France. The original description of the VizieR service was published in A&AS 143, 23.