Caroline's Rose cluster
Image information:
| Date: | 06/23/2024 |
| Equipment: | Altair Hypercam 533C colour camera through APM/LZOS 105/650 APO telescope on Losmandy GM8 mount. The telescope was working at f6.2 with Astro-Tech 2" field flattener. |
| Image type: | OSC |
| Exposure time: | 50X2min, gain 250 (0.8e/ADU). |
| Comment: | Image taken during almost full moon. |
Object information:
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Object designations: |
Caroline's Rose cluster, White Rose cluster, NGC 7789 |
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Object type: |
Open cluster |
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Object size: |
16' |
| Constellation: | Cassiopeia |
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Comment: |
With the age of 1.6 billion years NGC 7789 is one of the oldest open clusters known. Brighter and more massive stars in the cluster have already exhausted the hydrogen fuel in their cores and evolved into red giants. The cluster contains more than a thousand stars in diameter of 30 ly. The cluster is some 7.6 kly distant from us. NGC 7789 was discovered by Caroline Herschel in 1783. That's why it's known by name Caroline's Rose. |
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