Sh2-103, the Cygnus Loop

Constellation: Cygnus

Sh2-103, the Cygnus Loop, is a large supernova remnant in the constellation of Cygnus. It lies about 2’400 Ly from Earth and is about 120 Ly in diameter. It is about 20’000 years old. The scond image is annotated with its key visual components.

Telescope & Mount:

Celestron 9.25″ EdgeHD with Hyperstar 4.0 on a GM1000HPS mount

Imaging:

Camera: ASI2600MC-Pro (bin 1×1)

Data:
Optolong L-eNhance: 390x120s

Total integration time: 13h

Details of Pickering’s Triangle, a segment of relatively faint nebulosity was discovered photographically in 1904 by Williamina Fleming at Harvard Observatory, where Edward Charles Pickering was director at the time.

Details of the WesternVeil (NGC 6960).

Details of the EasternVeil showing NGC 6995 and IC 1340.

The EasternVeil, captured with narrowband filters: Hydrogen-alpha (yellow), Oxygen-III (blue), and Sulphur-II (red).

For this image the following equipment was used:

Telescope: Orion Optics UK AG14 on a Paramount ME GEM mount.

Camera: Kepler KL4040 CMOS (bin 1×1)

Data: Hα: 36x120s, OIII: 54x120s and SII: 54x120s. Total integration time: 4h 48′

Below are two magnifications of the same image.

Details of the EasternVeil (NGC 6995 and IC 1340), captured with narrowband filters: Hydrogen-alpha (yellow), Oxygen-III (blue), and Nitrogen-II (red).

For this image the following equipment was used:

Telescope: Planewave 17″ CDK f/6.8 Dall-Kirkham on a Planewave L-500 Fork Mount.

Camera: Kepler KL4040 CMOS (bin 1×1)

Data: Hα, OIII and NII: each 30x600s. Stars in RGB: each 6x600s. Total integration time: 18h

Details of Pickering’s Triangle captured with narrowband filters.

For this image the following equipment was used:

Telescope: Orion Optics AG 14″ Newtonian on a 10Micron GM2000 mount.

Camera: FLI KL4040 CMOS (bin 1×1)

Data: Hα: 36x120s, O-III: 58x120s and S-II: 79x120s. Total integration time: 5h 46′

Details of NGC6979 and NGC 6974 captured with narrowband filters.

For this image the following equipment was used:

Telescope: Orion Optics AG 14″ Newtonian on a 10Micron GM2000 mount.

Camera: FLI KL4040 CMOS (bin 1×1)

Data: Hα: 36x120s, O-III: 58x120s and S-II: 79x120s. Total integration time: 5h 46′