Rho Ophiuchi cloud complex is a close and active star forming region located in the constellation of Ophiuchus. It is mainly composed of gas and dust and hosts several amazing colorful nebulae.

This region is located some 460 light-years away from Earth.

It’s been a very difficult target due to its low altitude on the south horizon from my home observatory (at a latitude of 40º north).

The image has been captured using R, G, B and Luminance filters, to compose a two pane mosaic that aimed to capture an interesting part of this complex.

Image Details

L (124+160)x120″ with a total of 9h28′

RGB: (15 to 25)x120″ each channel with a total of 4h


All images at 120Gain -15ºC bin2

Calibrated with 50 flats, 50 darks, 50 bias


Total exposure: 13h28’


Average darkness:

20.90 mag/arcsec2

Image resolution: 2.12”/pixel


FSQ85ED telescope

Mesu200 mount

ASI294MM Pro camera with ZWO EFW 8 pos

Guiding with ASI174MC and ZWO OAG

Baader filters



Aleix Roig, July 2021.
Prades (Tarragona, Catalonia – Spain).

Link to Astrobin: https://www.astrobin.com/g6mccz

error: Image protected by copyright.