Best of AOP - Diffuse Nebulae

IC 4678

This image, taken by Ken Siarkiewicz and Adam Block, was featured as an APOD back in 2005. Below is the copied caption:

"Swirls of gas and dust enrich this little observed star field toward the constellation of Sagittarius. Just to the side of the more often photographed Lagoon Nebula (M8) and the Trifid Nebula (M20) lies this busy patch of sky dubbed IC 4678. Prominent in the above image are large emission nebulas of red glowing gas highlighted by unusually bright red filaments. On the left, a band of thin dust preferentially reflects the blue light of a bright star creating a small reflection nebula. On the right and across the bottom, swaths of thicker dust appear as dark absorption nebulas, blocking the light from stars farther in the distance. IC 4678 spans about 25 light years and lies about 5,000 light years distant" (APOD, 05/24/2005).

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Last Updated: 07-Jun-2014

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About This Image

Click on image for larger version.


20in RC Optical Systems telescope Operating at f/5.5

Paramount ME Robotic Telescope Mount

SBIG ST10XME CCD camera with color filter wheel

LRGB color production was used to create this image.

Luminance = 45 minutes binned 1x1

Red = 20 minutes binned 2x2

Green = 20 minutes binned 2x2

Blue = 20 minutes binned 2x2

Minimum credit line: Ken Siarkiewicz/Adam Block/NOAO/AURA/NSF