| Name | NGC 3648 |
| Type | GX [S0] |
| Other names | PGC34908 / UGC6389 |
| Constellation | Ursa major |
| descr | The FIRST source is 24 arcsec southeast of the optical nucleus. |
| RA | 11:22:31.3 |
| Dec | +39:52:37.0 |
| major_axis | 78.0'' |
| minor_axis | 48.0'' |
| position_angle | 75.0 |
| mag | 12.6 |
| surface_bright | 12.4 |