Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  The star 9Cyg  ·  The star φCyg
This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image), Kees Scherer
This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image)
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This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image)

This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image), Kees Scherer
This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image)
Powered byPixInsight

This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image)

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Description

SH2-091 is a faint Supernova remnant localized in the south of Cygnus near the star Albireo.

Many diffuse and filamentary structures are part of the structure ; (SH2-91, SH2-94 and SH2-96 are some of the parts.) The whole structure covers a field of more than 4°, which is very similar to the size of the popular Veil nebula.

However SH2-91 is much fainter, and at a larger distance of about 2500 Lightyears as compared with 1500 lightyears for the Veil nebula, and much older (~ 30000 years vs 7500 years).



The bright red "star" at center top is Cambell’s Hydrogen Star, a very unusual Wolf-Rayet star, which has very strong hydrogen lines and missing green oxygen lines. It has a small planetary nebula.



I first imaged this area in RGB with my Canon 6Da (43x240 seconds iso 1600) and the field only contained stars, wall to wall stars (This is a dense Milky way region). The following 2 nights i collected 5 hrs of Ha (20x900 seconds iso 1600) data through an Optolong 12nm Ha filter and combined this data with the RGB data in Pixinsight. Strong star reduction was applied using the MorphologicalTransformation function. The telecope used was an Esprit 100mm f5.5 APO. Dates: 2016, july 10,11,12,13.



Knight Observatory, Tomar

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  • This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image), Kees Scherer
    Original
  • Final
    This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image), Kees Scherer
    B

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This is NOT the Veil nebula but SH2-91, the other supernova remnant in Cygnus. (DSLR Image), Kees Scherer

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