Sh2-170: Little Rosette in Cassiopeia
Sh2-170: Little Rosette in Cassiopeia |
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SH2-170 |
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Object Data |
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| Object type: | Emission Nebula | |
| Size: | 20' x 20' | |
| Magnitude: | ? | |
| Constellation: | Cassiopeia | |
| Distance: | 7,500 light years | |
Notes: |
The open cluster at the center is Stock 18. Radiation from a bright O8 V star within the cluster ionizes the surrounding hydrogen, sulfer and oxygen gas to create this nebula. | |
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Exposure Data |
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| Date: | 10/1 and 10/2/21 | |
| Location: | Little Blair Valley, Anza Borrego Desert, CA | |
| Telescope: | DSI RC10c. 1867 mm fl at f/7.3 | |
| Camera: | FLI 6303E CCD camera with Astrodon Ha and OIII (3nm) filters | |
| Mount: | AP 1100 mount GTOCP3 | |
| Exposure time: | Ha:11 x 15 min, OIII and SII: 10 x 15 min ea | |
| Exposure time total: | 7.75 hrs | |
| Notes: | Color mapped by assigning Ha to Red, OIII to Blue and SII to Green. Abundant Ha and SII give the nebula an orange hue. FOV = 45 x 31 arc minutes (slightly cropped and reduced 66% of original size) |
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