M97 Owl (Patrick Stevenson)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 97 · NGC 3587 · Owl Nebula

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M97 Owl

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M97 Owl

My last version a few days ago was shot in my "old" typical way with 22 4'/ISO800 frames. The Owl looked like a green marble without a hint of the progenitor star. I had a long discussion with my old boss from Steward Observatory and decided to shoot again without a filter and using the histogram to determine the exposure. It turned out that I needed 30" subs to fit the histogram. I shot 186 frames at 30"/ISO800. I stacked them in DSS with no calibration frames. When I sent the result over to PixInsight I was amazed that I had NO LIGHT POLLUTION. As you can see, the nebula came out very nice. I had heard of others using extremely short exposures but had no idea that it would replace the expensive "light pollution" filters. Tonight I am imaging M108 running 60"/ISO800. The first ten frames look awesome! Dean Ketelsen, my old boss, explained how filters like L-eHance and L-eXtreme actually filtered out much of the light coming from stars. I love to learn something new, especially when it costs less and is easier to do!!

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Cloudy Nights

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	5601261
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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