The Rosette Nebula (Jeff Marston)

The Rosette Nebula

I got this image from my favorite dark site which is between a Bortle 2 and 3, probably closer to 3. There is some sky glow to the east because Tooele is one mountain range away and Salt Lake City is two mountain ranges away. Otherwise the stars just seem to go on forever from where I was. My light polluted neighborhood in Salt Lake City allows my to see few dozen stars on a good night. At my dark site I can probably see thousands of stars.

I started the night trying to image galaxies with my C11, but couldn’t quite get things lined up with the big scope. Part of the problem was the 15 degree F temp and a small breeze. I couldn’t make adjustments with my gloves on and I couldn’t feel the buttons with my gloves off. After an hour of numb fingers and no progress I switched to my ES ED127 scope. From there everything got easier and I was able to get some good frames.

I wanted to get 3 hours of data but high clouds showed up at about 11pm and my guiding started getting erratic. I settled for 30 frames at 4 minutes each. I used a Sony A7RIII camera with the ISO set at 1600 in full frame mode.

It’s kind of unusual for me to be so unsure about how to post process this image. I have probably re-stacked and re-processed this image a dozen times. Each time I am not sure I have it, whatever it is. The colors and the brightness we bring out in our astrophotos are usually not what the object would look like if we had a vehicle that could take us close to the objects we are imaging. I tend to look at a lot of other folks images and pick out the ones I like the best and then try to emulate what they have done. I just need to remember it is all about personal preference and not about being scientifically accurate. Most of us aren’t scientists, we are just photographers who often use larger lenses to capture beautiful images in the sky.

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Status	Basic success
Started	...
Astrometry.net job	5468258
PixInsight job	n/a
PixInsight queue size	n/a
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