NGC 6956 galaxy type SBb (upper right), UGC 11623 galaxy type SB(r)a (upper left) and UGC 11620
galaxy type S? (lower center) in Delphinus. Listed in Karachentseva Isolated Triplets of Galaxies
Catalogue as KTG 71 and in the “Atlas of Galaxy Trios” as GT 104. The image also shows the type Ia
supernova 2013fa in NGC 6956 (the blue star just above the nucleus in NGC 6956) which was discovered
Aug. 25, 2013 by Koichi Itagaki. Taken over several nights from Aug 26. 2013 through Sept. 12,
2013. 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) = 444:68:68:68. Captured with
Nebulosity, calibrated, sigma combined in Iris with other processing using PixInsight LE and
Photoshop CS. North is up.