After weeks of cloudy weather, we jump to a new region of the Milky Way to image the Rosette Nebula, with its intriguing structure reminding us of some star gate.
Know under the references Caldwell 49 or SH2-275, it isn HII region some 5000 light years away.
At the center of the Nebula are some young stars, whose temperature (30 000°) blast the surround gas clouds with intense UV rays.
Réduits à l’état de simples protons, ces atomes ont le bon goût d’émettre cette lumière quasi irréelle qui nous parvient, émise alors que les humains du néolithique s’affairaient à ériger Stonehenge.
| Target | Name | Rosette Nebula |
| Reference | SH2 275 | |
| More info | https://fr.wikipedia.org/wiki/N%C3%A9buleuse_de_la_Rosette | |
| Conditions | Date | 23 janvier 2022 |
| Location | Montréal | |
| Bortle | 9 | |
| Exterior Temp | -10° C | |
| Seeing | Moyen | |
| Equipment | Optics | Redcat 51mm |
| Main Camera | ASI294MC Pro | |
| Filter | Optolong L-Extreme | |
| Mount: | iOptron GEM28 | |
| Guide Scope | Orion 50/126mm | |
| Guide camera | ZWO ASI120MM mini | |
| Automation | Control | ASIair PLUS |
| Autofocus | ZWO EAF | |
| Shots | # of shots | 169 |
| Exposure time per shot | 30s | |
| Total integration | 1 hr 24 min 30 sec | |
| Calibration | 30x darks (-10°C, 300s) + 30x flats darks (-10°C, 4,8s) + 30x flats (-10°C, 4,8s) | |
| Processing | Software | Pixinsight 1.18 |
| Processes | WeightedBatchPreprocessing, DynamicCrop, PhotometricColorCalibration, SCNR, EZ Decon, EZ Denoise, Autoscript LocalEnhanceDetail, Darkness Enhance Detail | |
| Copyright | Author | Fabrice Lamidey |
| License | Creative Commons : Attribution, No Commercial Use (CC BY-NC) |