88 · Delporte 1930

LITThe IAU's 88 constellations have official boundaries, drawn by Eugène Delporte (1930) along B1875 RA/Dec lines. The data here is precessed to J2000, so the lines tilt slightly; Serpens has two parts, giving 89 polygons. The Hammer–Aitoff projection is equal-area, the professional choice for whole-sky maps (Gaia, Planck). Shown: the ecliptic (gold), the galactic plane (violet, using the IAU J2000 north galactic pole at RA 192.8595°, Dec +27.1283°), and Mars' north pole direction, cross-linked to the Sky over the Rim. Its pole star is near Deneb.

Tap a spot to name its constellation.

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