// Constellation
Triangulum
“Triangle”
- Latin name
- Triangulum (Tri)
- Best visibility
- evenings in December
- Fully visible between
- 90° N – 53° S
- Naked-eye stars
- 18
Triangulum is highest in the evening sky (around 9 pm) in December. The whole constellation rises above the horizon between 90° N and 53° S. Its brightest star is β Tri at magnitude 3 — about 127 light-years away.
The brightest stars
| Star | Designation | Magnitude | Distance |
|---|---|---|---|
| — | β Tri | 3 | 127 ly |
| Mothallah | α Tri | 3.42 | 63 ly |
| — | γ Tri | 4.03 | 112 ly |
| — | δ Tri | 4.84 | 35 ly |
| — | 6 Tri | 4.94 | 291 ly |
| — | 14 Tri | 5.15 | 433 ly |
More constellations
Star data: HYG database. Constellation borders: IAU.