The Leo Trio, also known as the M66 Group, is a small group of galaxies consisting of spiral galaxies M65, M66, and NGC 3628, an edge-on spiral. This group lies 35 million light-years away in the constellation Leo and spans about one degree (two full moons) across the sky. M65 (magnitude 10.3) is the galaxy to the upper right in this image and was discovered by Charles Messier in 1780. M66 (magnitude 9.7), also discovered by Messier in 1780, is lower right, and NGC 3628 (magnitude 9.4), discovered in 1784 by William Herschel, is on the left. Telescope: Stellarvue Raptor SVR105 @ f/7 Accessories: Stellarvue SFF7-21 flattener; Dew control by Dew Buster Mount: Orion Atlas EQ-G controlled by EQMOD; performance tuned by Astrotroniks Guiding: TS-OAG9 Off-axis, using a Starlight Xpress Lodestar via PHD Camera: QHY9-C one-shot color CCD @ -20.0C Filters: IDAS-LPS-P2 Exposure: 45 x 5min. (3hr. 45min.) Acquisition: ImagesPlus 4.0c Camera Control Processing: Calibration in Images Plus v4.0; Min/Max excluded average & HDR-DDP in Images Plus Post-processing: Adobe Photoshop CS5; Gradient XTerminator; HLVG; Carboni’s Tools Date(s): March 28 & April 1, 2011 SQM reading (begin - end): N1:18.67-cloudy; N2:18.72-18.81 Temperature (begin - end): N1:49.2F-46.2F; N2:52.7F-48.3F Location: Hendersonville, TN, USA