deep-sky
star cluster (open)
NGC 6871
NGC 6871 (in the middle of the image) is a small open star cluster, consisting of no more than 50 member stars.
It can be found in the constellation Cygnus.
Besides the star cluster in the center, a lot of dark nebulae (B146 & 147) and emission nebulae (LBN179, LBN182) can be seen in this image.
The large dark area just right of the center of the image is Barnard 146, the “snake like” protrusion below it is Barnard 147.
To the left of Barnard 147 there is an other small open star cluster which is catalogued as Biurakan 1.
Other / older versions :
Image information:
Object info
Name: NGC 6871
Type: Star cluster (open)
Constellation: Cygnus
Distance: 5133 ly
Date & location
Date: September 4, 2013
Location: Landgraaf, The Netherlands
Equipment & optics
Total integration: 3h6m
Camera: SBIG ST-8300M
Optics: TMB/LOMO 80/480
Mount: Losmandy G-11 Gemini
Image comments
All exposures were taken through IDAS LPS-2 filter which was in front of the filter wheel.
CCD Temp was set at -10.
About 25% of the combined Ha frame was blended into the red frame.
I managed to touch the dew cap when taking darks between Ha and RGB frames.
On the dew cap there is a set of thin strings attached for creation of star spikes, so there is a slight shift of the orientation of the star spikes between the Ha and RGB frames.
Still strugling to find a correct color balance, especially when blending in Ha as Luminance
