Celestial hemisphere:  Northern  ·  Constellation: Draco (Dra)  ·  Contains:  NGC 6552
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Cat's Eye Nebula (NGC 6543) with spectral analysis, Johannes D. Clausen
Cat's Eye Nebula (NGC 6543) with spectral analysis
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Cat's Eye Nebula (NGC 6543) with spectral analysis

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Cat's Eye Nebula (NGC 6543) with spectral analysis, Johannes D. Clausen
Cat's Eye Nebula (NGC 6543) with spectral analysis
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Cat's Eye Nebula (NGC 6543) with spectral analysis

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Description

Cat's Eye Nebula (NGC 6543) in Draco with spectral analysis using an SA100 grated filter.

"...relative to hydrogen, the helium abundance is about 0.12, carbon and nitrogen abundances are both about 3×10−4, and the oxygen abundance is about 7×10−4" (cf. wikipedia).

The indicated emission lines are:

434.0 nm: H-gamma

486.1 nm: H-beta

495.9 and 500.7 nm: OIII

587.6 nm: HeI

656.3 nm: H-alpha

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Cat's Eye Nebula (NGC 6543) with spectral analysis, Johannes D. Clausen