象限仪座
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象限仪座(拉丁语:mural quadrant)是法国天文学家热罗姆·拉朗德于1795年创建的星座。它描绘了一个挂在墙上的四分仪(象限仪),他和他的侄子Michel Lefrançois de Lalande(英语:Michel Lefrançois de Lalande)用它绘制了天球图,并在法国地图册中被命名为《Le Mural 》[1]。它位于牧夫座和天龙座之间,靠近大熊座的尾部[2],包含介于七公增七(牧夫座β)和摇光(大熊座η)之间的恒星[3]。
![The obsolete constellation Quadrans Muralis was composed of the faint stars above Boötes.](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Quadrans_muralis_map.png/220px-Quadrans_muralis_map.png)
![Highly artistic star chart imaging Boötes with his dogs (Canes Venatici, long flowing tresses of hair (Coma Berenices), and the Quadrant at the top](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Sidney_Hall_-_Urania%27s_Mirror_-_Bootes%2C_Canes_Venatici%2C_Coma_Berenices%2C_and_Quadrans_Muralis.jpg/640px-Sidney_Hall_-_Urania%27s_Mirror_-_Bootes%2C_Canes_Venatici%2C_Coma_Berenices%2C_and_Quadrans_Muralis.jpg)
约翰·波德将其名称改为拉丁语: Quadrans Muralis,并在1801年的《Uranographia》星图中将星座缩小了一点,以避免与邻近的星座发生冲突[1]。Quadrans Muralis was omitted