The mural quadrant (Latin Quadrans muralis ) is a constellation of the northern sky, the French astronomer Jérôme Lalande introduced the - probably in honor of Tycho Brahe, who had brought the same astronomical instrument to perfection.
The mural quadrant is a small group of stars between the official constellations Hercules, Bootes and Dragon. Main star is the star of CL Draconis, which has a brightness of 4.95 mag.
He is described in the star atlas by Johann Elert Bode Uranographia and other modern atlases, but not one of the 88 of the International Astronomical Union ( IAU) recognized constellations. It is probably the best known of the no longer recognized constellations, as the radiant of strong meteor shower Quadrantids lies in this area.