IC4604, IC4603 and IC4605, the "Rho Bros"
IC4604, IC4603 and IC4605 are reflection nebula that are part of the Rho Ophiuchi cloud complex that stretches over 5 degrees. IC4604 is the larger blue area at the top-left, IC4603 is the smaller blue nebula just to its right, and IC4605 is at the bottom-right. The large dark cloud is part of Barnard 44 which extends well beyond the image. This complex is one of the closest star-forming clouds to Earth, at "only" 460 light-years away. North is at the left.

Scope/Mount: StellarVue SV70T Refractor with SFFR-70APO Focal-reducer/Field-flattener, Celestron CI-700 Mount
Camera: ZWO ASI1600MMC monochrome with ZWO LRGB filters
Guiding: QHY5L-IIM through Orion Thin OAG, PHD guiding software
Exposure: L:(71) 120 secs @ gain=139, RGB: each channel (10) 120 sec @ gain=200
Software: Nebulosity, Pixinsight
Comment: 06-17-2023, Tierra del Sol, CA, good conditions, some dew.