The smaller, less bright orange star to the lower right of 42 Her is V906 Herculis, a long period variable star. Like 42 Herculis, V906 Herculis is also an M type star. The spectral class of V906 is M4III and it's visual magnitude is rather faint at 6.62. Most people would need a telescope to be able to view these stars.
This is a chance grouping of a pair of two similarily colored orange stars. Both are solitary stars so this is not a true double, just a pair that happen to be close in line with us. Even the small white star right directly next to 42 Herculis is a chance alignment.
Not seen but still within in this image is the x-ray source 1RXS J163843.5+485537. This is an unknown source of x-ray emissions that are thought to be coming from a companion object orbiting very close to 42 Herculis. So, maybe 42 Herculis is a genuine double star after all.
