NGC 3454 (top) spiral galaxy type SB(s)c? edge-on and NGC 3455 (bottom) spiral galaxy type
(R')SAB(rs)b in Leo. This pair of galaxies is also listed as KPG 257 in the “Catalogue of Isolated
Pairs of Galaxies in the Northern Hemisphere”. Taken March 2 and 3, 2012. Imaged with CCD Lab’s
Q285M camera and a Celestron EdgeHD 9.25 at f10, on a Losmandy G11/Gemini mount. The L subframes
were 12 minutes binned 1x1, while the RGB subframes were 4 minutes binned 2x2 resulting in the
following total exposures L:R:G:B (min) = 288:68:68:68. Captured with Nebulosity, calibrated, sigma
combined in Iris with other processing using PixInsight LE and Photoshop CS. North is up.