Sharpless 2-174 in Cepheus (Steve Milne)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

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Sharpless 2-174 in Cepheus

Link: https://stevemilne.smugmug.com/Photos/Sky/Nebulae/i-5zWzmhW

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Sharpless 2-174 in Cepheus

Link: https://stevemilne.smugmug.com/Photos/Sky/Nebulae/i-5zWzmhW

It was first thought that Sh2-174 was a planetary nebula associated with the white dwarf GD 561, even though this star was significantly offset from the centre of the nebula. A later opposing view was that Sh2-174 was a Strömgren Sphere (or zone) - a sphere of ionized hydrogen in the interstellar medium surrounding a young hot star. It is possible that Sh2-174 represents some sort of combination of planetary nebula and Strömgren sphere [see Ransom et al (2015) Astrophysical Journal 799:198].

Sh2-174 was photographed between 2 and 12 June 2021 from our widefield imaging rig in Spain. Capture details are as follows:

Telescope: Takahashi FSQ 106

Camera: QSI 683

Filters: Astrodon

Mount: 10 Micron GM1000HPS

Ha: 19 x 1200s

OIII: 24 x 1200s

Red: 36 x 300s

Green: 36 x 300s

Blue: 36 x 300s

A total of 23 hours and 20 minutes exposure.

Data: Steve Milne & Barry Wilson

Processing: Steve Milne

The refractors!
Narrowband imaging
Takahashi Refractors
Sharpless2 Objects
Planetary Nebulae
Entre Encinas y Estrellas (e-EyE)

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Sharpless 2-174 in Cepheus

Sharpless 2-174 in Cepheus

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