Wallpaper author:
Alistair Scobie
04 Apr 2026
CBT1 - The Galrlic Nebula
CTB 1, commonly known as the Garlic Nebula or the Medulla Nebula (also cataloged as Abell 85 or LBN 576), is an extremely faint supernova remnant (SNR) located in the constellation Cassiopeia. It represents the expanding debris shell of a massive star that exploded approximately 10,000 years ago..
This is an HOO image with RGB stars processed using both PixInsight and Photoshop.
Dataset from which the image was processed
CTB1 - Garlic Nebula
20 credit
- Type of target............................................................................................................................Emission Nebula
- Camera............................................................................................................................PLAYER ONE MONO 571
- Target coordinates............................................................................................................................RA 359.8042 Dec 62.4333
- Hemisphere............................................................................................................................Northern
- Telescope location............................................................................................................................Italy
- Transient event............................................................................................................................No
- Observed on............................................................................................................................31 Jul 2025 - 30 Aug 2025
Filter | Avg Exp (s) | Total Exposure | Subframes |
|---|---|---|---|
| Halpha | 811 | 24h20m | 108 |
| OIII | 597 | 17h55m | 108 |
| Red | 6 | 10m | 107 |
| Green | 6 | 10m | 107 |
| Blue | 6 | 10m | 107 |