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 1/1 the apparent diameter of the 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.