Western asterism
Keystone
This is an asterism, not one of the 88 official IAU constellations.
Part of: Hercules
Visibility
Northern sky
Best placed
May, June, July
Difficulty
easy
Pattern
4 stars, 4 lines
About
Keystone is a Western-tradition asterism spanning Hercules, not itself one of the 88 official IAU constellations.
- Keystone is a Western-tradition asterism - a recognizable star pattern that is not itself one of the 88 official IAU constellations.
- This pattern connects 4 stars with 4 lines in this game's stick-figure convention.
- Spans part of: Hercules.
Important Stars
ZetPi