A 20°×30° view of SH2-27, partially obscured by molecular clouds, is presented.
The large emission nebula, also known as the Cobold Nebula or the ζ Ophiuchi Nebula, has an apparent size of about 15°×10° and is ionized by the star ζ Ophiuchi.
Its distance of 440 light-years makes it one of the closest emission nebulae.
Click on the image to load a high resolution (78 MP) version using a JavaScript viewer.
False-color composite where Hα (without continuum) is mapped to red, blue continuum (including [OIII] and Hβ emissions) is mapped to green, and red continuum (without Hα but with [SII] emissions) is mapped to blue.
Emission nebulae appear reddish, while reflection nebulae range from green to blue. Stars are partially subtracted to make the faint nebulae visible.
SH2-27 is the large pinky nebula. Its ionization source, ζ Ophiuchi, is the the bright star at the center of the nebula.
Image data
This image was calculated using data from the Northern Sky Narrowband Survey, DR0.1. Click the link for detailed information or visit the instruments page for information about the equipment.
Here is some additional image-specific information:
Center position:
RA: 16:28h, DEC: -6:30°
FOV:
30°×20° (RA×DEC, through center)
Orientation:
JavaScript viewer: North is up
Above: North is right
Scale:
10 arcsec/pixel (in center at full resolution)
Projection type:
Stereographic
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