Sh2 -202 is an extended diffuse nebula visible on the border between the constellations of Cassiopeia and Camelopardalis (The Giraffe).
It is in the far east of Cassiopeia, east of the nebulae Heart and Soul , at the point where the Milky Way appears to stop abruptly, because of large shoals of dark dust. It is widely dispersed so weak and hard to detect. Direct observation is impossible and in any long-exposure appears only as a faint cloud centered on open cluster Stock 23, which is the best point of reference for its identification. The best period of observation in the evening sky is the months of October through March.[Source: Wikipedia]