2020 June 20 ~ The starfield in the constellations Aquila, Scutum & Serpens Cauda

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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 01.03 and 01.24 EDT
* Altitude of centre of frame at time of exposures: ~37°
* Temperature 16° C.

* Total exposure time: 10 minutes
* 105 mm focal length lens
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Description:

On of the brightest patches in the northern section of our home galaxy, the Milky Way, lies in the constellation Aquila (the Eagle), Scutum (the Shield), and Serpens Cauda (the Serpent's Tail). This starcloud contains many open clusters of stars, together with foreground globules of cold dark gas that are the incubators of new star formation.

One of the most prominent star clusters in this area of the sky is M11, the so-called "Wild Duck" cluster, which is a favourite observing target of amateur astronomers with modest telescopes. M11 is almost dead centre in this image. This is a rich open cluster of stars that looks like a duck in flight. See en.wikipedia.org/wiki/Wild_Duck_Cluster for more information about M11.

For a closer in view of M11 and the surrounding area, made on the same night with a 660 mm focal length telescope, click here:
www.flickr.com/photos/97587627@N06/50039721548

For a version of this photo WITH LABELS, showing constellation boundaries and the dozens of open and globular star clusters, and dark nebulae, click on the RIGHT side of your screen, or click here:
www.flickr.com/photos/97587627@N06/50061525587
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Technical information:

Nikkor AF-S 70-200 mm f/2.8 G ED VRII lens on Nikon D810a camera body, mounted on Astrophysics 1100GTO mount with a Kirk Enterprises ball head

Ten stacked subframes; each frame:
105 mm focal length
ISO 4000; 1 minute exposure at f/5, unguided
(with LENR - long exposure noise reduction)

Subframes stacked in RegiStar;
Processed in Photoshop CS6 (levels, brightness, contrast, colour balance, M11 masking)
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Taken on: June 30, 2020

Sets appears in: • Astrophotos 2020

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