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NGC 3239 (Arp 263), irregular galaxy, type IBm/P, in Leo. . Taken March 5, 6, 8, and March 15, 2008 with a DSI Pro II and Outback Cooler on a C8NGT, and an ASGT mount. The L sugbrames were 4 minutes at f7 (1400 mm) while the RGB subframes were 3 minutes at f5 (1000mm). The total exposures in L:R:G:B (min) = 260:69:75:69. Color balance was achieved via numerically scaled channels. Captured with Envisage, calibrated and sigma combined in Iris with other processing using FITZ, PixInsight LE and Photoshop CS. North is up.
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