Ausschnitt im Sternbild

Sh2-91 (SNR G65.3+5.7 )

Supernava remnant in the constellation of Cygnus.

Sh2-91 is part of the Supernava remnant G 65.3 + 5.7 in the constellation Cygnus, near the star Albireo, beta Cyg.

Sh2-91 part B
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Object: Sh2-91 part B
Date of exposures: 04.10.2021, 07.10.2021, 09.10.2021
Distance: 1.400 Lightyears
Exposures: RGB: 88 x 180", Ha: 40 x 480", OIII: 38 x 480", Sum: 14,75 hrs
Telescope: 10'', F4 Newton
Focal length: 1000 mm
Filter: Astrodon RGB E-Series, H-Alpha 5nm, OIII 3nm
Camera: ASI 1600 MMC Pro
Guiding: Off Axis Guider, Lodestar
Mount: EQ8

Sh2-91 is the remnant of a supernova that occurred about 30,000 years ago in the constellation of Cygnus at a distance of about 1,400 light-years. The shock wave, propagating at about 30,000 km/s, compresses and heats the interstellar matter to such an extent that the gas is ionized and excited to glow.

The entire SNR is oval shaped, and about the same size as the much better known Cirrus Nebula, also found in Cygnus. However, G 65.3 + 5.7 or Sh2-91 is considerably fainter than the Cirrus Nebula. Probably for this reason only few images of this region are seen.

Größerer Zusammenhang aus zwei Einzelbildern: