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The Coronet Cluster in X-Ray and Infrared
Sig07 017

Credit: NASA/CXC/J. Forbrich (Harvard-Smithsonian CfA), NASA/JPL-Caltech L.Allen (Harvard-Smithsonian CfA) and the IRAC GTO Team

Observation • September 13th, 2007 • sig07-017


While perhaps not quite as well known as its star-formation cousin Orion, the Corona Australis region (containing, at its heart, the Coronet cluster) is one of the nearest and most active regions of ongoing star formation. At only about 420 light-years away, the Coronet is over three times closer than the Orion nebula is to Earth. The Coronet contains a loose cluster of a few dozen young stars with a wide range of masses and at various stages of evolution, giving astronomers an opportunity to observe embryonic stars simultaneously in several wavelengths.

This composite image shows the Coronet in X-rays from Chandra (purple) and infrared from Spitzer (orange, green, and cyan). The Spitzer image shows young stars plus diffuse emission from dust. Due to the host of young stars in different life stages in the Coronet, astronomers can use these data to pinpoint details of how the youngest stars evolve.

About the Object

Coronet Cluster
Star > Grouping > Cluster
Star > Evolutionary Stage > Young Stellar Object
Nebula > Type > Star Formation
Nebula > Appearance > Emission
424 Light Years

Color Mapping

Band Wavelength Telescope
X-ray 1.5 keV Chandra ACIS:IRAC
Infrared 3.6 µm Spitzer IRAC
Infrared 4.5 µm Spitzer IRAC
Infrared 8.0 µm Spitzer


Position (J2000)
RA =19h 1m 47.6s
Dec = -36° 58' 32.8"
Field of View
16.9 x 16.9 arcminutes
North is 0.2° right of vertical