The Fighting Dragons of Ara


Thanks to the iTelescope staff for releasing this brilliant dataset for their members of NGC6188, otherwise known as The Fighting Dragons of Ara. NGC6188 is an emission nebula located about 4,000 light years away in the constellation Ara. The bright open cluster NGC 6193, visible to the naked eye, is responsible for a region of reflection nebulosity within NGC 6188.

This is a false colour image using the forax variant of the Hubble Pallet which transposes narrowband filter data SII to red, Ha to green and OIII to blue. The forax approach utilises parts of the Hubble SHO pallet, and a more traditional HOO pallet. The forax approach, using the pixelmath function if pixinsight, uses the actual data to determine which element offers the strongest signal and selects that signal for each individual pixel. The result is impressive I hope you agree.

The dataset which much larger than that shown above, the image below is a much larger area presented. The bright emission nebula at the bottom right of the image is NGC 6164-5 which is a rectangular, bipolar cloud with rounded corners and a diagonal bar producing an inverted S-shaped appearance. It lies about 4,200 light-years away in the constellation Norma.

The data was collected using the iTelescope T71 system which is an f/2.8 Takahashi Epsilon 180 mounted on a Software Bisque Paramount MyT. The camera system is a ZWO ASI 2600MM with Astrodon LRGB & Ha, OIII, SII Filters.

The data provided was LRGB images (46x180secs) and (SHO) Ha, OIII and SII data 63×300 secs, Only the SHO data was used in the images above.

Thanks for looking, Steve