Messier 91 (M91) is a barred spiral galaxy in the Coma Berenices constellation. Its alternative designation is NGC 4548. More distant galaxies in the image are PGC 169578 below and PGC 169575 above, with magnitude 10.4 star in our own galaxy at right.
Image taken using the 32-inch Schulman telescope with STX camera on Mt. Lemmon, AZ. Data capture and reduction by Adam Block, University of Arizona. LRGB processing by JDS using CCDStack and Photoshop CS6
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