| Ion | Ioniz. | Lines | Observed |
 |
| pot. (eV) | used | ratio | (cm-3) | |
| [S II] | 10.4 | 6731/6716 | 1.37 | 1900 |
| [O II] | 13.6 | 3626/3729 | 1.50 | 2200 |
| [S III] | 23.3 | 33.5/18.7 | 0.70 | 1400 |
| [Cl III] | 23.8 | 5538/5518 | 0.91 | 1600 |
| [C III] | 24.4 | 1906/1909 | 1.47 | 1600 |
| [O III] | 35.1 | 51.8/88.4 | 2.87 | 1350 |
| [Ar IV] | 40.7 | 4740/4711 | 0.93 | 2200 |