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The open cluster M52 is in a region rich in emission nebulas, the famous is the bubble nebula (NGC 7635). In the map below there are the names of the other objects visible in the image.
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| Optics | Pentax 75 apocromatic refractor, 75mm diameter |
| Focal Lenght | 500 mm |
| Focal Ratio | f/6.7 |
| Exposure Time | 50 min exposure |
| Film | Kodak E200 |
| Developement sensibility | 320 ISO |
| Location | Colle del Nivolet (AO, Italian Alps), at 2600m |
| Date and time of exposure start | 5 october 2002, 19.49 UT |
| Mount | Gemini G-41 |
| Tracking | ST4 |
| Temperature and humidity | T=+1°C, RH=75% |
| Notes | The image is a part of the original frame |
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