| WDS ID | 17199+2629 |
| Common catalogue ID | OSV 5 |
| Components | AB |
| Other Designation | V647 Her (A), V639 Her (B) |
| Position angle | 269 |
| Separation | 16.7 |
| Mag First | 11.42 |
| Mag Second | 13.3 |
| Delta mag | 1.88 |
| Spectral Type | M4+M4.5 |
| Constellation | Hercules |
| RA | 17:19:54.4 |
| Dec | +26:30:00.0 |