
NGC 1904 is a rewarding deep-sky target and presents itself as a diffuse object. It has moderate brightness.
Right now it is at about 15° altitude and reaches 65° around 05:14 PM.
It stays above 30° for roughly 8 hours.
Observing conditions matter, contrast improves away from light pollution.
It requires patience and good conditions.
With larger apertures, more structure becomes visible.
It is more subtle than brighter Dso objects.