| Galaxy | M51b | RA (J2000) | 13 29 59.5 |
| Constellation | Canes Venatici | Dec | +47 15 58.0 |
| Mag (V) | 10.5 | Other names | NGC5195 |
| Notes | Interacting with M51 |
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| HAG 24" RC, ZWO ASI2600MM Pro, Lhires III, 300 gr/mm, 1800 sec, 2026-07-15 |
| Interacting with M51 |
Spectrum across the core east/west The spectrum is very different to that of M51 which shows the emission lines characteristic of the active core of a Seyfert galaxy. In contrast M51b shows Na, Fe and Mg absorption lines characteristic of the stellar population. |