Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
|  | Separation\n(arcsec) | Separation\n(au) | Most Recent\nPosition Angle | Period\n(years) | Semi-major axis\n(arcseconds) | Notes |
| --- | --- | --- | --- | --- | --- | --- |
| AB-CD | 208.2 | 10,500 | 172 |  |  | ε1-ε2 |
| AB | 2.3 | 116 | 347 | 1804.41 | 4.742 | components of ε1 |
| CD | 2.4 | 121 | 79 | 724.307 | 2.92 | components of ε2 |
| Ca | 0.1 | 5 | 225 |  |  | recently discovered\ninterferometric companion |
| AI | 149.6 | 7500 | 138 |  |  |  |
| CE | 63.7 | 3200 | 333 |  |  |  |
| EF | 46 | 2300 | 37 |  |  |  |
| EG | 50 | 2500 | 238 |  |  |  |
| GH | 35 | 1800 | 358 |  |  |  |
Question:
what orbit pair is listed before ca?
Answer:
CD