Quadrans Muralis (Latin for mural quadrant) was a constellation created by the French astronomer Jérôme Lalande in 1795. It depicted a wall-mounted quadrant that he and his nephew Michel Lefrançois de Lalande had charted the celestial sphere with. It was between the constellations of Boötes and Draco, near the tail of Ursa Major, containing stars between β Bootis and η Ursae Majoris (Alkaid).
The variable star BP Boötis was a member of the constellation.
- Ridpath, Ian. "Quadrans Muralis". Star Tales. Self-published. Retrieved 25 March 2016.
- Ridpath, Ian. "Lalande's Quadrans Muralis". Star Tales. Self-published. Retrieved 25 March 2016.
- 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.
- 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.
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