IC 1274 | Emission, Reflection and Dark Nebulae in Sagittarius

IC 1274 sits in Sagittarius, right beside the Lagoon Nebula (M8), as part of the wider NGC 6559 complex. It is a beautiful part of the sky that is often overlooked because of its famous neighbour. What I particularly love about this region is how much it packs into a single field: blue reflection nebulae, glowing emission, intricate dust, and a remarkably dense star field.

Processing

That mix makes it a really interesting field to process. I deliberately avoided muting the stars too much, as they are such a beautiful part of this region and so many of them are resolved here. It is quite fun to zoom in and appreciate how densely they are scattered across the image.

This data was drizzled 2x and processed at that scale. The approach works particularly well with the Askar 107PHQ and my trusty ZWO ASI1600MM Pro, giving finer detail and letting the scope punch above its weight for its focal length. The trade-off is some loss of signal-to-noise ratio, but on a field as bright as this one it is well worth it, and it suited the panoramic crop I wanted for the region.

Colour mapping

The narrowband data was blended with LRGB so that each emission line sits within a natural colour palette:

H-alpha: red/magenta, with a fair amount of blue, to match the natural colour of the LRGB
OIII: blue, with a touch of green
SII: a darker shade of magenta, so its contribution stays visible while blending into the natural palette

Equipment

Captured with my own remote rig at Nebula Nest Remote Observatories in Antwerp, Victoria, under Bortle 1 skies. Having a personal remote setup is really helping bring this kind of image to life.

Telescope: Askar 107PHQ
Camera: ZWO ASI1600MM Pro
Mount: Sky-Watcher EQ6-R Pro
Filters: Antlia 3nm H-alpha, OIII and SII; Antlia Pro LRGB

Explore the full-resolution image and acquisition details on AstroBin.

Frames:
Antlia Luminance Pro: 45×300s (3h 45m)
Antlia Red Pro: 47×300s (3h 55m)
Antlia Green Pro: 16×300s (1h 20m)
Antlia Blue Pro: 15×300s (1h 15m)
Antlia 3nm H-alpha: 21×1200s (7h)
Antlia 3nm OIII: 20×1200s (6h 40m)
Antlia 3nm SII: 20×1200s (6h 40m)

Integration:
30h 35m

RA center: 18h09m40s

DEC center: −23°52′23″

Pixel scale: 1.05 arcsec/pixel

Field of view: 1.33° × 1.00°

Sky Plot

Sky plot showing the IC 1274 field in Sagittarius, near M8 and M20
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