NGC 5746

Click on image for larger version.

NGC 5746 is a spiral galaxy view edge-on from our perspective. This galaxy is estimated to be 95 million light years way. Edge-on galaxies like this provide astronomers with an opportunity to measure particular aspects of spiral galaxies. In this case, astronomers can measure the velocity of stars (by analyzing a the spectrum of the galaxy) at different distances along the disk of the galaxy. From this they can determine a rotation curve of the galaxy which may lead to measurements of the galaxy's mass or even mysterious things such as "dark matter." Also notice how the central halo of this galaxy has a box-like shape. Astronomers do not understand exactly how this shape evolved - but a leading theory proposes that a barred spiral galaxy viewed from this perspective might give rise to the box like structure.


20in RC Optical Systems telescope Operating at f/8.4
Paramount ME Robotic Telescope Mount
SBIG ST10XME CCD camera with color filter wheel

L R G B color production was used to create this image.

Luminance = 90 minutes binned 1x1
Red = 20 minutes binned 2x2
Green = 20 minutes binned 2x2
Blue = 20 minutes binned 2x2

  • Two iterations of L-R deconvolution (sharpening) algorithm using CCDsharp were applied to the luminance image.

  • Digital Development (DDP) via Maxim/DL was also used in order to display the the very dim and very bright details of the image simultaneously.

  • Minimum credit line: Sherry and Steve Bushey/Adam Block/NOAO/AURA/NSF

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    Updated: 04/03/2002