Triangulum
The triangle. Genitive Trianguli, abbreviated Tri. Introduced by Ptolemy.
Area
131.92 sq°
78 of 88 by size
Brightest star
β Trianguli
magnitude 3.00
Best seen
October
on the meridian at midnight
Visible from
90°N to 64°S
some part above the horizon
Where it is
Principal stars
Every star to magnitude 4, brightest first.
| Star | Magnitude | HR |
|---|---|---|
| β Trianguli | 3.00 | 622 |
| α Trianguli | 3.41 | 544 |
Deep sky
Objects with a Messier number or a name people use.
| Object | Catalogue | Type | Magnitude | Size |
|---|---|---|---|---|
| M33 | Triangulum galaxy · NGC 598 | Galaxy | 5.7 | 62.0 |
- Magnitude: — where NGC 2000 gives none.
- Size: the largest dimension, in arcminutes.
My Sky
Rise, highest and set over your place, for any night: Triangulum
Further info
Sources
Principal stars: Bright Star Catalogue
Deep sky: NGC 2000.0
Area and borders: IAU constellation boundaries
