Western asterism
The Hercules Keystone
This is an asterism, not one of the 88 official IAU constellations.
Visibility
Southern sky
Best placed
August, September, October
Difficulty
hard
Pattern
9 stars, 9 lines
About
The Hercules Keystone is a Western-tradition asterism, not itself one of the 88 official IAU constellations.
- The Hercules Keystone is a Western-tradition asterism - a recognizable star pattern that is not itself one of the 88 official IAU constellations.
- This pattern connects 9 stars with 9 lines in this game's stick-figure convention.