Sh2-278 is a visible emission nebula in the constellation Orion.
It is a fragment of the gas clouds that make up the Orion cloud. Like the other peripheral clouds of the complex, the latter also exhibits signs of erosion due to the shock wave caused by the stellar wind of the bright stars of spectral class O and B belonging to the association Orion OB1, which are also source of ionization. Basically, the nebula is composed of two gas emanations, with the head facing the association and the scattered emanation facing the opposite side. Part of the gas that makes up the cloud is not ionized, therefore remaining dark, while other parts are illuminated but not ionized, therefore bright by reflection..
| Object | SH2-278 Emission Nebula |
| Constellation: | Orion |
| Position: | RA 5h 20m 18.5s Dec 013° 35' 22'' RA -05 48 19 |
| Apparent Size: | 50 x 50 arcmins |
| Apparent Magnitude: | |
| Distance in light years: | 1630 ly |
| Photo Data | |
| Date: | 24 Oct 2023 - 17 Oct 2024 |
| Location: |
El Sauce Observatory Chile (1525m ASL) GPS: 30.472529° S, 70.762999° W |
| Telescope: | CHI-1-CMOS: Planewave CDK24 610 mm, f/d 6.5/3962mm |
| Camera: | QHY 600M Pro, 3.76μm, 9576 x 6382px, Bin-2 4788x3191px, @ T sensor = -10°C |
| Field of View: | 31x21 arcmins |
| Pixel Scale/Resolution: | 0.39 arcsec/px |
| Expose frames/times: | L 22x300s, R 14x300s, G 13x300s, B 12x300s, H 44x300s |
| Total expose: | 9h 10min |
| Filter: | Astrodon Luminance, Red, Green, Blue, Ha (3nm) |
| Mount: | Mathis MI-1000/1250 with absolute encoders |
| Software: | Siril 1.4, Photoshop CC |
| Remarks: |
© Photos and photo data by Peter Cerveny
© Object description/intro text fully or partially by Wikipedia,
which is released under the Creative Commons Attribution-ShareAlike 4.0 International License