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Spectroscopic Atlas for Amateur Astronomers 161
TABLE 83 [N ll] 6583.6 Richard Walker 2011/12©
Hα 6562.82
Classification lines He I 5875.6
Excitation class E8
Saturn Nebula NGC 7009 [O lll] 5006.84
[O lll] 4958.91
Criterion log (IN1+N2 /IHe II (4686))≈ 1.9
Hβ 4861.33 [Ar IV] 4740.3
[Ar IV] 4711.34
He II 4685.7
[N III] 4641
He I 4471.5
[O lll] 4363.2
Hγ 4340.5
Hδ 4101.74
[Ne III] 3967.47
[Ne III] 3868.76
