Quote:
Originally Posted by Merlin66
Picking up a 16 mag image in a 10sec sub is pretty good!
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Hi Ken
I understand that the ASI174MM chip (Sony IMX174 monochrome CMOS sensor) has a published Quantum Efficiency of 78% at its peak with a very low read noise of only 6e-.
My previous attempts had been with my SBIG ST2000XM which although cooled, has the Kodak KAI-2020M sensor with a QE of approx. 55% and typical Read Noise (rms) average of 7.6 e-.
This time, I also used a newly purchased Televue x2 Powermate (2” model from Bintel) and coupled with the good seeing, I managed to collect a few grains of light that heralded the position of Miranda.
It’s a pity that the position of the dim satellite was located in one of the spider diffraction spikes…
Cheers
Dennis
UPDATE:
I’ve just had a look at the aligned/stacked raw frame from Autostakert!2 and after applying Curves in CS6, I located two barely distinct clumps of light that match the positions of the following stars:
- a Magnitude 17.32 star at RA (Topocentric) 01h 02m 39.73s: Dec (Topocentric) +06° 00' 33.20"
- a Magnitude 17.04 star at RA (Topocentric) 01h 02m 40.29s: Dec (Topocentric) +06° 00' 10.95"
As displayed in The Sky X Pro with Catalog Identifier: NOMAD and Source Catalog: Nomad source:USNOB.
Impressive results for a 7" scope and webcam eh!
Cheers
Dennis