| Ion | Ioniz. | Lines | Observed |
 |
| Pot. (eV) | used | ratio | (cm-3) | |
| [S II] | 10.4 | 6731/6716 | 1.38 | 1900 |
| 13.6 | 3626/3729 | 1.61 | 2700 | |
| 23.3 | 33.5/18.7 | 0.38: | 2800 | |
| 23.8 | 5538/5518 | 1.08 | 3000 | |
| C III] | 24.4 | 1906/1909 | 1.29 | 3300: |
| 35.1 | 51.8/88.4 | 2.24 | 900: | |
| 40.7 | 4711/4740 | 1.08 | 2100: | |
| 63.5 | 2425/2422 | 0.92 | 5000: |
|
: Indicates uncertain values. Wavelengths of the far infrared lines are in microns, the rest are in Angstroms. |