Submissions: 2017 September

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Re: Submissions: 2017 September

Post by Ann » Sun Oct 01, 2017 7:17 am

sternklar wrote: Cygnus-Starfield - between Cocoon and Crescent Nebula, Berne, Switzerland, Aug. 20, 2017 ... Aug-17.htm

Exposure data:
Carl Zeiss Milvus Planar T* 85 mm 1:1.4 ZE @ f/2.8 with Canon EOS 6Da. Exposure time: 117 x 2 minutes @ 800 Asa.

Copyright: Manuel Jung,
Great picture! Note the little Cocoon Nebula in the lower left corner!

Also note the slightly diffuse "binary nebula" surrounding the hot highly luminous O-type runaway star 68 Cygnus. This fairly large nebula, almost as large as the relatively well-known Butterfly Nebula (seen in the upper right corner here) is located to the lower left of the North America Nebula.

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Re: Submissions: 2017 September

Post by mhultstrom » Sun Oct 01, 2017 8:09 am

LDN1164 dark nebula in Cepheus. Total exposure 7h45min. Captured using iTelescope's T11. A 510mm f6.8 Planewave CDK at the Mayhill observatory in New Mexico. L-RGB exposure, 330min luminance Bin1, and 45min Bin2 for each of RGB. Rendered using Nebulosity, PixInsight and Lightroom.

ImageLDN1164-33x600L-15x180RGB by Michael Hultström, on Flickr

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Re: Submissions: 2017 September

Post by Kinch » Sun Oct 01, 2017 11:10 am

tadpoles (1618 x 1072).jpg
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Re: Submissions: 2017 September

Post by astrosirius » Sun Oct 01, 2017 6:17 pm


Based on its appearance in visible light, the Andromeda Galaxy is classified as an SA(s)b galaxy in the de Vaucouleurs–Sandage extended classification system of spiral galaxies. However, data from the 2MASS survey showed that Andromeda is actually a barred spiral galaxy, like the Milky Way, with Andromeda's bar oriented along its long axis. M31 is known to harbor a dense and compact star cluster at its very center. In a large telescope it creates a visual impression of a star embedded in the more diffuse surrounding bulge. In 1991, the Hubble Space Telescope was used to image Andromeda Galaxy's inner nucleus. The nucleus consists of two concentrations separated by 1.5 parsecs (4.9 ly).

Detail of the core of the Galaxy.

Place: Àger-Lleida
Dates: 27-29-30 Sep. & 2-4-5 Oct. 2016
SQM: 21.3-21.6
Telescope: GSO RC14” Truss.
Camera: Moravian G2-8300
Exposures: L:18x300 seg R:G:B: 12:12:12 seg x 300 seg. bin 1x1
Processing: Pixinsight y Photoshop CC 2015.5 ... 525f_o.jpg
Copyright by Lluís Romero
Last edited by bystander on Wed Oct 04, 2017 6:50 pm, edited 1 time in total.
Reason: Please, no hotlinks to images > 500Kb. Substituted smaller image.

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Re: Submissions: 2017 September

Post by Star_Digger » Sun Oct 01, 2017 8:00 pm

Last edited by bystander on Wed Oct 04, 2017 6:56 pm, edited 1 time in total.
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Re: Submissions: 2017 September

Post by donwaid » Wed Oct 04, 2017 6:41 pm


Copyright: Donald P. Waid Imaging details and Image description may be view at the link below: ... 01-NB.html
(Click on the displayed images to progress to higher resolution versions.)

Best regards,
Donald Waid