This was my first time to use the Roboscopes CDK 17, so there was some experimenting with exposure times.
NGC 6503 is a dwarf spiral galaxy located at the edge of the local void, a region of space that is at least 150 million light years across, which seems to contain no galaxies or stars, and GC 6503 finds itself on the edge of this region. It is a an example of a field galaxy; that is, one that is not part of a group of galaxies and so is gravitationally alone. It is approximately 30,000 light years across and 18 million light years distant. (Wikipedia,
https://www.nasa.gov/image-feature/goddard/lonely-galaxy-lost-in-space)
"The galaxy’s central region is a good example of something known as a "low ionisation nuclear emission region", or LINER. These are less luminous than some of the brightest galaxies. Emission from NGC 6503’s heart is believed to be the result of a starved black hole that is only just being kept active, receiving a very small amount of infalling gas to keep its large appetite at bay." (
https://esahubble.org/news/heic1513/)
The images were taken using a Planewave 17" CDK and Kepler KL4040 CMOS camera (Roboscopes Pier 8 )
The exposures were:
Lum: 75x90s, 12x120s
R: 5x90s, 19x120s
G: 5x90s, 19x120s
B: 5x90s, 19x120s
Ha: 5x180s, 3x240s
Total exposure time 5h
Calibrated using flats, darks and biases
Calibrated, registered and stacked in Astro Pixel Processor and post-processed using Pixinsight
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