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Cas A SNR © Ken Crawford Rancho Del Sol Observatory MPC G67
| Filter | Exposures |
|---|---|
| Clear/ Lum | 240 minutes |
| Red | 180 minutes |
| Green | 180 minutes |
| Blue | 180 minutes |
| Ha 5nm | 540 minutes |
| OIII 3nm | 360 minutes |
| SII 5nm | 0 minutes |
Cassiopeia A (Cas A) is a supernova remnant around 11,000 light-years away. Though it is very faint in optical light, it is one of the brightest extra solar radio sources in the sky. The lower right image shows the X-ray engery from NASA NuSTAR overlaid on top of Ken Crawford's optical image. Cas A Comparision link HERE. You may also see this image and write-up at NASA APOD.
RCOS 20" carbon truss - 100mm FFC
Paramount ME
Apogee Alta u16803
SBIG ST402 Guider
Astrodon MegaMoag
Astrodon 50mm Sq Filters
MaxDL 5
CCDAutopilot 5
CCDStack2
Photoshop CS5
Paramount ME
Apogee Alta u16803
SBIG ST402 Guider
Astrodon MegaMoag
Astrodon 50mm Sq Filters
MaxDL 5
CCDAutopilot 5
CCDStack2
Photoshop CS5
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Cas A SNR revealed with over 28 hours of total exposure time. Cas A X-ray data credit NASA/JPL-Caltech/DSS.
These images may be used for personal or educational use without contacting me. But, these images and this website are Copyright © Ken Crawford. If you are a publisher and would like a full resolution link to this or other images please contact Ken Crawford.
