2019 Aug. 1 ~ Starcloud in the constellation Scutum
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Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 22.43 and 23.03 EDT
* Altitude of centre of frame at time of exposures: ~35°
* Temperature 17° C.
* Total exposure time: 10 minutes
* 200 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) and Scutum (the Shield). This starcloud contains many open clusters of stars, together with foreground globules of cold dark gas that are the incubators of new star formation.
The central axis or equator of the Milky Way runs diagonally across the upper right of the photo.
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 just to the right of and below 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 three nights latter with a 660 mm focal length telescope, click here:
www.flickr.com/photos/97587627@N06/48471276616
For a version of this photo WITH LABELS, click here:
www.flickr.com/photos/97587627@N06/49333284961
___________________________________________
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:
200 mm focal length
ISO 3200; 1 minute exposure at f/4.5, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (levels, brightness, contrast, colour balance, bright star and M11 masking)
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2019 Aug. 1 ~ Starcloud in the constellation Scutum
***************************************************************************
Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 22.43 and 23.03 EDT
* Altitude of centre of frame at time of exposures: ~35°
* Temperature 17° C.
* Total exposure time: 10 minutes
* 200 mm focal length lens
___________________________________________
Description:
On of the brightest patches in the northern section of our home galaxy, the Milky Way, lies in the constellation Aquila (the Eagle) and Scutum (the Shield). This starcloud contains many open clusters of stars, together with foreground globules of cold dark gas that are the incubators of new star formation.
The central axis or equator of the Milky Way runs diagonally across the upper right of the photo.
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 just to the right of and below 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 three nights latter with a 660 mm focal length telescope, click here:
www.flickr.com/photos/97587627@N06/48471276616
For a version of this photo WITH LABELS, click here:
www.flickr.com/photos/97587627@N06/49333284961
___________________________________________
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:
200 mm focal length
ISO 3200; 1 minute exposure at f/4.5, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (levels, brightness, contrast, colour balance, bright star and M11 masking)
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