Sharpless 308
Popularly known as the Dolphin Head nebula, SH2-308 in Canis Majoris is an expanding shell of hot gas expelled by its central star. The nebula does show some red light from hydrogen ions but it is dominated by the blue emission of oxygen ions.
This widefield shot also shows red hydrogen emission nebulae in the Dolphin Head's neighbourhood.
This image is a stack of over 6 hours of data taken on an IR-modified Canon 700D camera with a William Optics Redcat51 telescope. I used an Optolong L-eXtreme dual band filter to improve the contrast of the hydrogen and oxygen ion emissions. All post-processing was carried out in PixInsight.
Observed from Prachinburi, Thailand.
Sharpless 308
Popularly known as the Dolphin Head nebula, SH2-308 in Canis Majoris is an expanding shell of hot gas expelled by its central star. The nebula does show some red light from hydrogen ions but it is dominated by the blue emission of oxygen ions.
This widefield shot also shows red hydrogen emission nebulae in the Dolphin Head's neighbourhood.
This image is a stack of over 6 hours of data taken on an IR-modified Canon 700D camera with a William Optics Redcat51 telescope. I used an Optolong L-eXtreme dual band filter to improve the contrast of the hydrogen and oxygen ion emissions. All post-processing was carried out in PixInsight.
Observed from Prachinburi, Thailand.