2019 Aug. 2 ~ Hydrogen gas cloud IC 1396 in the constellation Cepheus
***************************************************************************
Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 23.29 and 00.01 EDT
* Altitude of the nebula at time of exposures: 63°, increasing to 67°
* Temperature 15° C.
* Total exposure time: 15 minutes
* 660 mm focal length telescope
___________________________________________
This is a large ionized emission nebula and star forming region more than 100 light-years in diameter, located about 2,400 light-years away in the constellation Cepheus. The gas cloud is energized by the bright multiple star HD206267, which is just a little right of centre in this image, as well as by the entire cluster (Tr37) of young, bright, bluish hot stars that is in the centre of the cloud.
Per Wikipedia: The HD206267 "system is emitting a stellar wind that reaches an exceptional velocity of 3,225 km/s, among the highest measured for stars of this type".
The very small Elephant’s Trunk Nebula (IC 1396A) is the elongated globule to the right of centre. Up to 250 stars are in the process of being created in this nebula. One 2012 study of this region argues that "the TSF [triggered star formation] mechanism in IC 1396A is a radiation-driven implosion process persisting over several million years".
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@N06/49230602858
For a view of this same region made with a 540 mm focal length telescope two years earlier, click here:
www.flickr.com/photos/97587627@N06/36698969403
__________________________________________
Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic astrograph, mounted on Astrophysics 1100GTO equatorial mount
Fifteen stacked subframes; each frame:
ISO 8000; 1 minute exposure at f/5.2, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (brightness / contrast, levels, colour balance)
***************************************************************************
2019 Aug. 2 ~ Hydrogen gas cloud IC 1396 in the constellation Cepheus
***************************************************************************
Photographed at Algonquin Provincial Park, Ontario, Canada
(285 km by road north of Toronto)
between 23.29 and 00.01 EDT
* Altitude of the nebula at time of exposures: 63°, increasing to 67°
* Temperature 15° C.
* Total exposure time: 15 minutes
* 660 mm focal length telescope
___________________________________________
This is a large ionized emission nebula and star forming region more than 100 light-years in diameter, located about 2,400 light-years away in the constellation Cepheus. The gas cloud is energized by the bright multiple star HD206267, which is just a little right of centre in this image, as well as by the entire cluster (Tr37) of young, bright, bluish hot stars that is in the centre of the cloud.
Per Wikipedia: The HD206267 "system is emitting a stellar wind that reaches an exceptional velocity of 3,225 km/s, among the highest measured for stars of this type".
The very small Elephant’s Trunk Nebula (IC 1396A) is the elongated globule to the right of centre. Up to 250 stars are in the process of being created in this nebula. One 2012 study of this region argues that "the TSF [triggered star formation] mechanism in IC 1396A is a radiation-driven implosion process persisting over several million years".
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@N06/49230602858
For a view of this same region made with a 540 mm focal length telescope two years earlier, click here:
www.flickr.com/photos/97587627@N06/36698969403
__________________________________________
Nikon D810a camera body on Tele Vue 127is (127 mm - 5" - diameter) apochromatic astrograph, mounted on Astrophysics 1100GTO equatorial mount
Fifteen stacked subframes; each frame:
ISO 8000; 1 minute exposure at f/5.2, unguided
(with LENR - long exposure noise reduction)
Subframes stacked in RegiStar;
Processed in Photoshop CS6 (brightness / contrast, levels, colour balance)
***************************************************************************