| AstroLAB's Interesting Tables | |||||
| Colours of Aurorae | |||||
| Wavelength (nm) | Emitting Ion, atom or molecule | Height (km) | Visual Colour | ||
| 391.4 | N+ (nitrogen ion) | 1000 | violet-purple | ||
| 427.8 | N+ (nitrogen ion) | 1000 | violet-purple | ||
| 557.7 | O (oxygen atom) | 90 - 150 | green | ||
| 630.0 | O (oxygen atom) | > 150 | red | ||
| 636.4 | O (oxygen atom) | > 150 | red | ||
| 661.1 | N2 (nitrogen molecule) | 65 - 90 | red | ||
| 669.6 | N2 (nitrogen molecule) | 65 - 90 | red | ||
| 676.8 | N2 (nitrogen molecule) | 65 - 90 | red | ||
| 686.1 | N2 (nitrogen molecule) | 65 - 90 | red | ||
| Source: The Cambrdige Encyclopedia of the Sun (Kenneth R. Lang) | |||||