Triangulum
spiral galaxy · Triangulum · 5.7ᵐ
The Triangulum Galaxy — third largest in the Local Group. It faces us flat-on, so despite its total brightness its surface brightness is low and it demands dark skies.
Notable facts
Covers about 2.3 times more sky than the Moon.
In brief
Which constellation is Triangulum in?
Triangulum lies in Triangulum.
Is Triangulum visible to the naked eye?
5.7ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe Triangulum?
Best observed in October.
Data
- RA / Dec (J2000)
- 1h 34m · +30° 39′
- Type
- spiral galaxy
- Constellation
- Triangulum
- How to observe
- 5.7ᵐ — visible to the naked eye (under dark skies)
- Angular size
- 71×42′
- Designation
- M33 · NGC 598 · Triangulum
Observing tip
Get away from city light pollution — it washes out the faint glow of galaxies first.
Altitude above the horizon by latitude
| Latitude | Maximum altitude | Rise azimuth |
|---|---|---|
| +60° | 61° · never sets | — |
| +55° | 66° | 27° |
| +45° | 76° | 44° |
| +30° | 89° | 54° |
| 0° | 59° | 59° |
| −35° | 24° | 52° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 17:48 |
| February | 15:41 |
| March | 13:56 |
| April | 12:02 |
| May | 10:08 |
| June | 08:02 |
| July | 05:58 |
| August | 03:57 |
| September | 02:04 |
| October | 00:15 |
| November | 22:15 |
| December | 20:06 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.