Summer Triangle

As I often do when trying to name patterns, I looked to the stars. This time I found a quartet of unusual star groupings. These stars are each in their own constellations, and also participate in asterisms, groupings of stars that are not physically related to each other. There are four seasonal asterisms: The Great Square of Pegasus in autumn, The Winter Hexagon, The Great Diamond in spring, and The Summer Triangle. The three stars in The Summer Triangle are Altair, Deneb, and Vega. These stars are in the Aquila, Cygnus, and Lyra constellations respectively. Like these asterisms, the three designs in my Summer Triangle are not actually related to each other, except that they are all found here, in this grouping: Quenington, Lombard,and Spanish Dancer.