A small (but growing) list of selected (read handy!) optical lines:
| element | wavelength(Å) |
|---|---|
| [NeV] | 3346 |
| [NeV] | 3426 |
| [OII] | 3727 |
| [NeIII] | 3869 |
| [NeIII] | 3967 |
| Hε | 3970 |
| [SII] | 4072 |
| Hδ | 4101 |
| Ca I | 4226 |
| Hγ | 4340 |
| [OIII] | 4363 |
| HeI | 4471 |
| HeII | 4686 |
| Hβ | 4861 |
| [OIII] | 4959 |
| [OIII] | 5007 |
| [NI] | 5199 |
| [FeVII] | 5721 |
| [NII] | 5755 |
| HeI | 5876 |
| [FeVII] | 6087 |
| [OI] | 6300 |
| [OI] | 6364 |
| [FeX] | 6375 |
| [NII] | 6548 |
| Hα | 6563 |
| [NII] | 6583 |
| [SII] | 6716 |
| [SII] | 6731 |
| [ArIII] | 7136 |
More lines: NIST’s atomic spectroscopy & NIST’s molecular spectroscopy databases (thanks to Brian Kloppenborg for pointing to them..!)
Another list of emission lines is found in Drew Chojnowski’s galaxy emission page.