M37
open cluster · Auriga · 5.6ᵐ
The richest of Auriga’s three clusters, with over 500 stars and a prominent orange giant near the centre.
Notable facts
About the same apparent size as the full Moon.
In brief
Which constellation is M37 in?
M37 lies in Auriga.
Is M37 visible to the naked eye?
5.6ᵐ — visible to the naked eye (under dark skies).
When is the best time to observe M37?
Best observed in December.
Data
- RA / Dec (J2000)
- 5h 52m · +32° 33′
- Type
- open cluster
- Constellation
- Auriga
- How to observe
- 5.6ᵐ — visible to the naked eye (under dark skies)
- Angular size
- 24′
- Designation
- M37 · NGC 2099
Observing tip
Best in binoculars or a telescope at low power, so the whole cluster fits in the field of view.
Altitude above the horizon by latitude
| Latitude | Maximum altitude | Rise azimuth |
|---|---|---|
| +60° | 63° · never sets | — |
| +55° | 68° | 20° |
| +45° | 78° | 40° |
| +30° | 87° | 52° |
| 0° | 57° | 57° |
| −35° | 22° | 49° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 22:07 |
| February | 20:00 |
| March | 18:14 |
| April | 16:21 |
| May | 14:27 |
| June | 12:20 |
| July | 10:17 |
| August | 08:16 |
| September | 06:22 |
| October | 04:34 |
| November | 02:33 |
| December | 00:24 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.