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The Devils Tower - RCW85 (July 2023)


This is an image of a not popular and rarely imaged and very faint nebula located almost exactly in between Alpha and Beta Centauri making it a deep southern sky object.

Another batch of data I had on the HDD that I didn't process exposed during last July.
I came across this uncommon and unpopular object on a post when searching for a new object to image but researching this object did not result in too much information other than it is a rarely imaged emission nebula in the constellation ”Centaurus”.

It’s labeled as ”The Devils Tower”, resembling the "Devil's Tower National Monument" in the USA. This nebula is about 6000 light year away and it is number 85 in the RCW (Rodgers, Campbell & Whiteoak) catalog… which is an astronomical catalogue or Hα-emission regions in the southern Milky Way.

This image was exposed with a QHY268M through a simple doublet 80mm refractor (at 500mm focal length) between 12-22 July 2023.

The total integration time was 38 hours and 40 minutes of subs in Hα, OIII and SII narrowband with LRGB wideband color.
This photo consists of 61 x 300s of Luminance and 21x120s of Red, 21x180s of Green and 20x300s of Blue wideband subs with most of the signal picked up through the narrowband filters consisting of 49x600 of Hα, 46x900 of SII, 42x900 of OIII subs.

Software used to capture and stack this image was APT 4.26, PHD 2.6.11 and DSS 5.1.3.


© Mariusz Goralski
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