20170402_AR2645_134815_AS_f50_g4_ap255_conv_1600px Published 02/04/2017 at 1055 × 703 in Big Sunspots AR2644 & AR2645 ← Previous Next → Active Region 2645, 50 frames of 524, Astro-Physics 127mm f/8, QHY5L-II, Vixen 2x Barlow