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Open Cluster M103, color-coded as described below.

This 3-color composite RGB image was created by combining three monochrome images, each taken with a particular filter/plate combination. The blue color-plane corresponds to the blue-sensitive J plate, green color-plane corresponds to the yellow-sensitive F plate, red color-plane corresponds to the red-sensitive N plate.

Creative Commons License Copyright © Michael Richmond. This work is licensed under a Creative Commons License.