Jewel of the Nile - M42 in NB (Andy 01)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Great Orion Nebula · IC 420 · IC 430 · Lower Sword · M 42 · M 43 · Mairan's Nebula · NGC 1973 · NGC 1975 · NGC 1976 · NGC 1977 · NGC 1980 · NGC 1981 · NGC 1982 · Orion Nebula · The star 42Ori · The star 45Ori · The star θ1Ori · The star θ2Ori · The star ιOri · Upper Sword · the Running Man Nebula

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Jewel of the Nile - M42 in NB

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Jewel of the Nile - M42 in NB

"The Jewel of the Nile" - my take on this perennial favourite, M42 in Narrowband.

This is 7 different filters, 5nm Ha, 3nm O3, 3nm S2 & a touch of 3nm N2, R, G & B, in all 17 datasets combined.

25 hrs exposure 60sec for the RGB stars & the core, 300 sec, 1200 sec and 1800 sec exposures.

I've added RGB stars to replace the NB.

The "ears" of NGC 1999 are lurking at 4 o'clock and some other interesting shapes not often seen in the outer gaseous regions, especially the "finger" at 7 o'clock.

Interesting how "the Running Man" doesn't feature in NB. He showed up ok in the blue but probably needs more broadband integration than these 18x60 sec exposures allow.

I've mapped Ha to blue, O3 to orange/red & S2 (enhanced with a touch of N2) to yellow/green - this colour palette allows visual separation of the NB emission lines.

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Jewel of the Nile - M42 in NB

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