| Ion | Ioniz. | Lines | Observed |
 |
| Pot. (eV) | Used | Ratio | (cm-3) | |
| [S II] | 10.4 | 6731/6716 | 1.80 | 6000 |
| 23.3 | 33.5/18.7 | 0.27 | 8000 | |
| 23.8 | 5538/5518 | 1.72 | 10 000 | |
| 27.6 | 21.8/8.99 | 0.044 | 40 000 | |
| 40.9 | 4740/4711 | 1.85 | 16 000 | |
| 41.1 | 15.5/36.0 | 13.3 | 9000 | |
| 60.0 | 13.1/7.90 | 0.75 | 20 000 | |
| 97.0 | 24.3/14.3 | 0.462 | 7500 |