Messier 40
This faint double star, Winnecke 4, was found by Charles Messier when he was searching for a nebula. The two components are of visual magnitudes 9.0 and 9.3, and their separation on the sky is 49 seconds of arc.

This is really nothing more than a double star. Both stars are fairly faint and appear to be white in color. They have a somewhat wide separation.
You can find more information about this Messier object by visiting: SEDS - The Messier Catalog.

    Winnecke 4
    M40
    SAO 28355
    GSC 3840:564, PPM 33523, HD 238108
    Spectral: B9IV
    Proper motion (mas/yr): RA = 1.70, Dec = 78.60
    Magnitudes Bt: 10.733, Vt: 10.149
    Magnitude: 10.09
    RA: 12h 22m 33.21s Dec: +58°03'57.50"
    RA: 12h 22m 19.03s Dec: +58°05'10.45" (Epoch 2000)
    Azm: 43°50'03" Alt: +40°32'15"
    Always above horizon. Transit: 19:07
    Position error: 20.73 mas
RASC Charlottetown Centre