Quadrans Muralis

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The obsolete constellation Quadrans Muralis was composed of the faint stars above Boötes.
Map of the obsolete constellation Quadrans Muralis in relation to the modern constellations

Quadrans Muralis (Latin for mural quadrant) was a constellation created by the French astronomer Jérôme Lalande in 1795. It depicted a wall-mounted quadrant with which he and his nephew Michel Lefrançois de Lalande had charted the celestial sphere, and was named Le Mural in the French atlas.[1] It was between the constellations of Boötes and Draco, near the tail of Ursa Major,[2] containing stars between β Bootis and η Ursae Majoris (Alkaid).[3]

Johann Elert Bode converted its name to Latin as Quadrans Muralis and shrank the constellation a little in his 1801 Uranographia star atlas, to avoid it clashing with neighboring constellations.[1]

In 1922, Quadrans Muralis was omitted when the International Astronomical Union (IAU) formalised its list of officially recognized constellations.[4]

Notable features[edit]

Highly artistic star chart imaging Boötes with his dogs (Canes Venatici, long flowing tresses of hair (Coma Berenices), and the Quadrant at the top
Quadrans Muralis can be seen at the top left of this 1825 star chart from Urania's Mirror.


  1. ^ a b Ridpath, Ian. "Quadrans Muralis". Star Tales. Self-published. Retrieved 25 March 2016.
  2. ^ Ridpath, Ian. "Lalande's Quadrans Muralis". Star Tales. Self-published. Retrieved 25 March 2016.
  3. ^ Inglis, Mike; Moore, Patrick (2015). The Observer's Year: 366 Nights of the Universe: 2015 – 2020. New York, New York: Springer. p. 178. ISBN 978-3-31918-678-8.CS1 maint: Multiple names: authors list (link)
  4. ^ "The Constellations". International Astronomical Union. Retrieved 2018-01-12.
  5. ^ Smyth, William Henry (1844). A Cycle of Celestial Objects: For the Use of Naval, Military, and Private Astronomers. 2. London, United Kingdom: John W. Parker. p. 329.