I had a little time to finalize this photo of M42 in quick pose.
What's interesting with the fast poses is the ability to photograph objects with sampling a little tighter than usual in the deep sky.
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On M42, we will be able to improve the resolution of the center of the cavity and reveal details, like the proplyds.
The proplyds or protoplanetary discs are very young stars whose disc of dust has not disappeared.
On my photo we see better the biggest as 142-301 and 114-426.
we also see Herbig-Haro objects (objects HH), this is the next step of the proplyds, to finish on T-Tauri stars before the stability of the main sequence.
All this information is the result of an astrometric calibration with Aladin.
It is amazing this app!
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I pushed a little treatment on my infrared session with the barlow 3x.
I wanted separate H1 and H2 separately, I found on the internet a snapshot of HST infrared.
The filter they used is more selective, so some stars appear in addition.
The main one is there.
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Everything is done with the ASI224mc and the 300mm F4 with different focal lengths to improve this famous trapeze and to try some proplyds which are in this star nursery which factory with full gas!
the wide shot is composed of 4 images to F4 (the sensor of the 224mc is small) in panoramic mode.
the exhibition chosen was 200ms, gain 420-450, for 54,000 captured and 40000 guarded.
Then for the central cavity, I went to 50ms associated with a barlow 1.5 for 72000 images kept just enough to clear the stars of the trapeze but keeping some nuances in the surrounding gas.
After I mixed catches in ir742 barlow 1.5, expo: 200ms 25000 guarded, the infrared allowed me to improve the stars and reveal some hidden by the cloud.
And I finished, with infrared ir742 and a barlow 3x for the heart, which allows to separate H1 and H2.
the treatment is performed by SIRIL, an extremely efficient software for the treatment of SER with low-contrast objects, this is the case in short exposures.
my setup in action: