De Mairan's Nebula
star-forming region · Orion · 9.0ᵐ
De Mairan’s Nebula — part of the Orion Nebula complex, cut off from M42 by a dark dust lane and lit by its own young star.
Notable facts
About 1/2 the apparent diameter of the Moon.
In brief
Which constellation is De Mairan's Nebula in?
De Mairan's Nebula lies in Orion.
Is De Mairan's Nebula visible to the naked eye?
9.0ᵐ — a telescope is needed.
When is the best time to observe De Mairan's Nebula?
Best observed in December.
Data
- RA / Dec (J2000)
- 5h 36m · −5° 16′
- Type
- star-forming region
- Constellation
- Orion
- How to observe
- 9.0ᵐ — a telescope is needed
- Angular size
- 20×15′
- Designation
- M43 · NGC 1982
Observing tip
A UHC or OIII filter sharply raises the contrast. Start at low power to take in the whole nebula.
Altitude above the horizon by latitude
| Latitude | Maximum altitude | Rise azimuth |
|---|---|---|
| +60° | 25° | 101° |
| +55° | 30° | 99° |
| +45° | 40° | 97° |
| +30° | 55° | 96° |
| 0° | 85° | 95° |
| −35° | 60° | 96° |
Geometric altitude at upper culmination, atmospheric refraction not included. Positive latitudes are in the northern hemisphere.
Culmination time by month
| Month | Culmination |
|---|---|
| January | 21:50 |
| February | 19:43 |
| March | 17:57 |
| April | 16:04 |
| May | 14:10 |
| June | 12:04 |
| July | 10:00 |
| August | 07:59 |
| September | 06:06 |
| October | 04:17 |
| November | 02:16 |
| December | 00:08 |
Upper culmination in local solar time — no time-zone or daylight-saving correction applied.