Asterisms · Asterism · 4 stars across Pegasus, Andromeda
Asterism
Great Square of Pegasus
The Great Square of Pegasus: four stars marking the autumn sky, and an honest test of how dark your sky is.
- Stars
- Alpheratz, Scheat, Markab, Algenib
- Constellations
- Pegasus, Andromeda
- Spans
- about 21° of sky
- Highest at midnight
- mid September
Look for
Count the stars inside the square. From a city, none; from a rural site, perhaps a dozen.
Did you know
Its north-east corner, Alpheratz, officially belongs to Andromeda, not Pegasus.