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Old 30-10-2021, 03:54 PM
Startrek (Martin)
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Join Date: Dec 2017
Location: Sydney and South Coast NSW
Posts: 6,684
NGC 1365 Great Barred Spiral Galaxy under Sydney Skies

Gusty hot westerly winds abated yesterday afternoon in Sydney to leave a clear night. Decided to image NGC 1365 a barred spiral galaxy in Fornax for only the second time. My rig is grossly undersized in aperture and focal length to tackle this small dim magnitude 10 galaxy under Bortle 8 skies but had a go anyway. Atmospheric conditions started off ordinary but did improved into the evening and by 2.00am seeing was really good.
6” f6 Bintel GSO newt
Skywatcher EQ6-R mount
ZWOASI2600MC set in Ascom to highest dynamic range Gain 0 cooled to -10C
220 x 60sec dithered guided subs ( dithered every 3rd sub)
30 x Flats
40 x Bias
Tracking and Goto EQMOD and Ascom Stellarium
Captured with APT
PHD2 Multistar guiding ( started at 0.90 and an hour later was down to 0.65 to 0.70 arc sec error total ) Ra and Dec almost the same values
Stacked in DSS
Processed in Startools V1.7 Linear data set
Even with heaps of short subs , dithering and calibration, stretched image was fairly noisy which is a bit disappointing

Original frame version
Crop version

Comments welcome
Thanks
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