
Messier 43 (De Mairan’s Nebula)
- Messier 43 (M43), also known as De Mairan’s Nebula, is famous for being a teardrop-shaped companion and semi =-detached portion of the Great Orion Nebula (Messier 42) .
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- Object Name
M43
- Object Type
Reflection Nebula
- Constellation
Orion
- Magnitude
+9.0
- Distance
1,400 light-years
- Age
30,000 years old
- Annoated

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Equipment
Telescope:
Mount:
Accessories:
Sky-Watcher Esprint 80ED Triplet
Sky-Watcher AZ-EQ6 GT
ZWO ASIair Plus / PixInsight
Camera:
Guiding:
Filter:
ZWO ASI2600MC Pro Cooling
ZWO ASI1200MM
2″ Optolong eXtreme
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Bortle Scale: Milton Keynes, Buckinghamshire (Bortle 8 – City Sky)
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Integration
- Date:
Monday 3rd February 2025
o - Time:
20:15 / 8.15pm
- Moonlit:
Waxing Crescent 6 days old
Magnitude: -10.2
Moonlit: 31%
- Total:
180’s x 16 subs = 48 minutes
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Constellation :- Orion (The Hunter)

Object :-
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Object :-
Other name :-
Type:
Magnitude :–
Distance :-
Constellation :-
Right Ascension :-
Declination :-
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M43
NGC 1982 / De Mairan’s Nebula
Reflection Nebula
+9.0
1,400 light years / 9 light years across
Ori (Orion / The Hunter)
05h 35m 31s
-05° 16′ 12″
Enlarge on click the map.

(Click the map above for a large view.)
| Abbreviation: Ori (Orion) |
| English Name: The Hunter |
| Genitive: Betelgeuse |
| Hemisphere: Northern and Southern Hemisphere. (Bold means the more area in square feet in Southern Hemisphere.) |
| Location: Between the constellations of Monoceros and Eridanus. |
| Visible between latitudes: +90 and -40 degrees |
| Best season: Winter |
| Seen in three seasons: Autumn, Winter and Spring |
| Best seen in: January (map) and February (map) |
| Seen between: November and early March |
| Right Ascension (RA): 05 hour |
| Declination (DEC): +05 degrees |
| Area (square degrees): 594 (26th) |
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