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NGC 1968 - Traditional Lum RGB, 


            Terry Robison
NGC 1968 - Traditional Lum RGB

NGC 1968 - Traditional Lum RGB

Technical card

Resolution: 4008x2672

Frames: 72x900"

Integration: 18.0 hours job: 2799520

RA center: 81.688 degrees

DEC center: -67.492 degrees

Pixel scale: 0.803 arcsec/pixel

Orientation: 76.138 degrees

Field radius: 0.537 degrees

Data source: Own remote observatory

Remote source: Non-commercial independent facility


NGC 1968 – Emission Nebula in the Large Magellanic Cloud.

NGC 1968 is an emission nebula located in the Large Magellanic Cloud (LMC). Searches for NGC 1968 or N51D will allow further exploration about the surrounding objects on the frame. The large circular looking object near the centre has an interesting story. It is responsible for both heating the emission, and illuminating the reflection component of this nebula. The frame includes both emission and reflection nebula, plus an open cluster. The LMC is a place where many new stars are born. Many Young Stellar Objects (YSOs) can be located within this interesting nebula. YSOs are future stars that are in the initial development stages. In 2005, the Spitzer telescope located a Herbig Haro (HH) object located in the rim of the bowl-shaped structure. This is one of the first found and characterized outside of our own galaxy. HH objects are bright patches of nebulosity associated with newborn stars. They are created when narrow jets of partially ionized gas are ejected and collide with nearby clouds of gas and dust at high speeds. This phenomenon is indeed transient, lasting only a few tens of thousands of years. What makes this particularly interesting is that they can change visibly over short time scales (a little as a few years) as they move quickly away from their parent star.

Another point to consider is that you are looking within another galaxy. The LMC is a dwarf galaxy just outside our galaxy, The Milky-Way. It’s incredible that we are able to resolve a very dense star field and reveal features of a nebula in another galaxy using a modest instrument only 250 mm or 10 inches across.

I provided a complete data set for the “The Astro Imaging Channel” workshop that was presented on the 15th of July 2019. The set includes traditional Lum R G B masters (18 hours worth), plus an additional 45 hours of narrowband data. Participants shared how they worked through the data.

This image presented is a Luminance Red Green Blue. I think the highlights in this image are the dense star fields and their colours. The interaction of gasses with the interstellar medium is very cool as well. For me, the feature I like most would be the reflection nebula with the very subtle blues coming through, almost glass like.

Equipment Details:

•10 Inch RCOS fl 9.1
•Astro Physics AP-900 Mount
•SBIG STL 11000m
•FLI Filter Wheel
•Baader Planetarium H-alpha 7nm Narrowband-Filter
•Baader Planetarium OIII 8.5nm Narrowband-Filter
•Baader Planetarium SII 8.0nm Narrowband-Filter

Total Time: 18 hours

Thanks for looking.




Terry Robison
License: None (All rights reserved)

Sky plot

Sky plot


NGC 1968 - Traditional Lum RGB, 


            Terry Robison