2016 Nov. 18 ~ The Heart Nebula (IC 1805)

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Photographed at Algonquin Provincial Park, Ontario, Canada

(285 km by road north of Toronto)

* Temperature 11 degrees C.

 

Total exposure time: 15 minutes.

* 540 mm focal length telescope

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Description:

 

This large hydrogen gas nebula lies about 6,000 light-years away in the constellation Cassiopeia, and in the Perseus Arm of our Milky Way galaxy. The nebula is energized by hot stars near the centre in this view, some of which are about 50 times the mass of our own Sun. The nebula has a diameter of about 200 light years.

 

For a wider angle view of Cassiopeia and this nebula, made with a 50 mm lens on the same evening, click here:

www.flickr.com/photos/97587627@N06/31139391496

 

For a version of this photo WITH LABELS, click on your screen to the RIGHT of the photo, or click here:

www.flickr.com/photos/97587627@N06/31079227441

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Technical information:

 

Nikon D810a camera body on Teleview 101is apochromatic refracting telescope, mounted on Astrophysics 1100GTO equatorial mount

 

Fifteen stacked frames; each frame:

540 mm focal length

ISO 5000; 1 minute exposure at f/5.4; unguided

(with LENR - long exposure noise reduction)

 

Subframes registered in RegiStar;

Stacked and processed in Photoshop CS6 (brightness, contrast, colour balance, levels)

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Done