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Spectroscopic Atlas for Amateur Astronomers 162

TABLE 84 Richard Walker 2010/05©

[O lll] 5006.84

Classification lines [O lll] 4958.91
Hβ 4861.33

He II 4685.7

Excitation Class E10 [S ll] 6732.7
[S ll] 6718.3

[N ll] 6583.6

Hα 6562.82
[N ll] 6548.1

[O l] 6363.88
[O l] 6300.23

Ring Nebula M57 [O l] 5577.4

Criterion log (IN1+N2 /IHe II (4686))≈ 1.4 [O lll] 5006.84

[O lll] 4958.91
Hβ 4861.33