Hickson 93 (Arp 099), galaxy group in Pegasus. Members include NGC 7550 type E-S0 in the lower
center, NGC 7549 type SBc/P (upper center), NGC 7547 type SBa/P (right center), CGCG 454-015 (may
also be NGC 7553, left center) and NGC 7558 type E-S0 (lower left). Taken Sept 18, 19, and 20,
2009. Imaged with CCD Lab’s Q285M and a C8N at f5 on a Losmandy G11/Gemini mount. The L subframes
were 5 minutes binned 1x1, while the RGB subframes were 2.5 minuutes binned 2x2 resulting in the
following total exposures L:R:G:B (min) = 290:50:50:50. Captured with Nebulosity, calibrated and
sigma combined in Iris with other processing using PixInsight LE and Photoshop CS. North is up.