Harold Corwin

IC 3048 is probably the western of two stars near Schwassmann's position. His positions are systematically too far east by about 0.3 or 0.4 seconds of time and about 2 arcsec too far north. Taking these offsets into account leads to the western star.

However, his standard deviation is around 5 arcsec in both coordinates, so it is not implausible that he actually saw a blended image of both stars on his plate.

Unfortunately, since the plate can not at present be found at Heidelberg, we can't check this or any of the other missing "nebulae" that Schwassmann found on it.

― IC Notes by Harold Corwin