Owl Nebula, M97, NGC 3587 (Steve Robbins)

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

Owl Nebula, M97, NGC 3587, Steve Robbins

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Owl Nebula, M97, NGC 3587

Revision title: Color Adjustment

Powered byPixInsight

Owl Nebula, M97, NGC 3587

Revision title: Color Adjustment

About 6 hrs of Ha and 4 hrs of OIII in HOO color mapping.

The Owl Nebula has been expanding at a rate of 27 to 39 Km/s for about 8,000 years. It is located about 2,030 light years away in Ursa Major. The glow is due to the central star's radiation. The nebula consists of three shells, with the largest about 25% larger than the next smaller shell. The inner shell is not symmetric and is what yields the two darker areas that make up the "Owl Eyes".
The central, 14th magnitude star, is shedding it's mass. The ejection is triggered at the end of the life of a star by a rapid variation in the nuclear luminosity in the helium-burning interior of the star. There are typically more than one period of mass ejection. The central star is about 60% the mass of our sun but is putting out around 100 times as much light. It is likely to end up as a white dwarf when the ejection ceases.
Among the three most popular NB filters, it emits in Ha the strongest with OII close behind and SII significantly less.

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Title: Color Adjustment

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ZWO ASI1600MM/QHY163M
Suburban Astrophotography
The refractors!

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Owl Nebula, M97, NGC 3587

Revision title: Color Adjustment

Owl Nebula, M97, NGC 3587

Revision title: Color Adjustment

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Owl Nebula, M97, NGC 3587

Revision title: Color Adjustment

Owl Nebula, M97, NGC 3587

Revision title: Color Adjustment

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