Sh2-27 – Emission Nebula in the constellation Ophiuchus (Serpent-Bearer)

The star ζ Oph in the constellation Serpent-Bearer is a young, massive and very hot star, which excites the surrounding hydrogen gas to glow up to a distance of 50 light-years. The resulting nebula is very large with a diameter of about 10° in the sky, equivalent to 20 full moon diameters. However, it is very faint and can only be imaged with long exposure times.

larger image
Date: 06.08.2021
Optics: Sigma 85mm f/1.4 DG HSM Art at f/4
Focal Length: 85 mm
Camera: Canon EOS 700Dac
Exposure: 26 x 600 s
Location: Chamaeleon Observatory, Onjala Lodge, Namibia
Processing: Nebulosity, Registar, Photoshop
Diameter:100 light years
Distance:460 light years
annotated image

image field in the sky