SNR G181.1+9.5

SNR G181.1 is an extremely faint supernova remnant located in the constellation Auriga. Born from the explosion of a massive star, this expanding cloud of gas interacts with the surrounding interstellar medium, revealing delicate filamentary structures mainly visible in Ha and OIII emission. Its very low surface brightness makes it a challenging target, requiring long hours of integration to unveil its subtle details.

With this SNR currently low on the horizon, the difficulty is further increased by atmospheric turbulence and poor seeing conditions, making it necessary to capture even the Ha data during New Moon.

Technical details:
Askar SQA 106 refractor / 509 mm focal length
Player One Poseidon M Pro camera
Antlia 3 nm Pro series filters, 2"
Pegasus Nyx-101 mount

Integration time:
Ha: 188 × 600 s — 31h 20m
OIII: 135 × 600 s — 22h 30m
RGB: 3 × 36 × 300 s — 9h
Total integration: 62h 50m

Processing: Siril, PixInsight, Photoshop

‍ ‍Name: Lionel Malherbe