M90 (NGC 4569) Spiral Galaxy type Sb, in Virgo and IC 3583. M90 is also cataloged as Arp 76 in the
class "Spiral with a High Surface Brightness Companion". Taken on the nights of Apr 15, and Apr 19,
2007 under poor transparency, with a DSI Pro II and Outback Cooler on a C8NGT (8" Newtonian f5).
LRGB subframes were 150 sec resulting in the following total exposures L:R:G:B ( in min) =
178:73:73:78 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.