NGC 6188, 6164-5 and Surroundings (HOS True Colorish) (Alex Woronow)

NGC 6188, 6164-5 and Surroundings (HOS True Colorish)

NGC 6188, 6164-5 and Surroundings (HOS True Colorish)

OTA: FSQ106 with 0.73x reducer
Camera: QHY 600M Pro
Observatory: Heaven’s Mirror via Telescope Live AUS2

Exposures:
H: 12 x 300 sec
O: 12 x 300 sec
S: 12 x 300 sec
Total Exposure time used: 3 hours
Resolution (as published): 5.4 arcseconds/pixel
One pixel spans 2 trillion km at the distance of NGC 6188, which is about in the center of the image, and the total image width at that distance is 2 quadrillion km.

Processing: PixInsight, Topaz Studio2, 3DLUT, Aurora HDR, custom scripts for image weighting and star replacement (down-sampled 4x for publication)

This image maps the HOS data to an approximation of their true colors so that if our eyes were sensitive enough to see the color of these nebulae through a telescope, the color shown here would be close to what the telescope reveals. Adding blue H-beta emission (calculated as a proportion of the H-alpha signal) shifts the red somewhat off a pure red, making the image less harsh and more realistic.

NGC 6164-5 is the blue circular nebula right of center. It adds a touch of interest to the sizeable hydrogen-dominated clouds that back it.

With the very short focal length, the base pixel resolution suggested that maybe a 2x drizzle would be useful…but that would then require an 8x downsampling to obtain a reasonable publication size.

Alex Woronow

Final
Original
B

B

Description: Annotated image

Uploaded: ...

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Status	Basic failed
Started	...
Astrometry.net job	7938840
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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