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Author Topic: NGC891  (Read 418 times)

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Offline Dean

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NGC891
« on: 15:29:41, 19 December, 2017 »
After weeks of no sky in the South West a clear night last night.  NGC891 captured with 29x600s light frames using the 235mm EdgeHD.
All calibration and processing in PI.
Dean

Scopes: Celestron 235mm (9.25”) EHD SCT; and 203mm SCT
Mounts: Celestron CGEM; and AVX
Cameras: Celestron Nightscape 10100 OSC Camera; Skyris 618C Camera with IR filter and Luminos 2.5x Barlow
Off Axis Guider and LoadstarX2 Guider
Focus: Starlight Feather Touch Focusers and Boss II Focus Control
Aurora flat-field light panel
Software: SGP; PHD2; MaximDL; FocusMax; SkyX; iCAP; PixInsight; Photoshop; Registax

Offline psjshep

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Re: NGC891
« Reply #1 on: 21:28:14, 19 December, 2017 »
An old fave of mine....  nice, Dean :clap:

Phil
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Offline Eccoskies

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Re: NGC891
« Reply #2 on: 20:10:00, 20 December, 2017 »
Very nice Dean. One of my favourites too  :thumbup:
Mark
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Offline Roger B

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Re: NGC891
« Reply #3 on: 15:49:06, 21 December, 2017 »
Nicely done,   

Rog
Scopes - TS65q, W/O 110 Triplet
Mount - EQ6 PRO via  Eqmod,  Rowan belt modded
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Offline Nimbus

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Re: NGC891
« Reply #4 on: 15:51:31, 21 December, 2017 »
Nice capture ATB Jim
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Offline PaulB

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Re: NGC891
« Reply #5 on: 06:18:41, 22 December, 2017 »
Nice capture.
But. I can see a gradient that spoils it. Maybe further processing in PI could remove this?
Paul.
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Offline clive

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Re: NGC891
« Reply #6 on: 16:46:38, 22 December, 2017 »
My favourite galaxie nice image to

Offline Dean

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Re: NGC891
« Reply #7 on: 16:04:15, 02 January, 2018 »
Thank you for the replies.  There is some light gradient which is actually the product of stacking pre and post meridian flip images.  This has created a gradient that is a bright horizontal band in the centre fading as we move vertically away from the centre in either direction.

Reworked the images by stacking and gradient extraction of the pre-merdian flip and then separately the post meridian flip images.  These were then re-aligned and combined.  This seems to cope with the gradient more effectively. 

Advise and views appreciated on this.
Dean

Scopes: Celestron 235mm (9.25”) EHD SCT; and 203mm SCT
Mounts: Celestron CGEM; and AVX
Cameras: Celestron Nightscape 10100 OSC Camera; Skyris 618C Camera with IR filter and Luminos 2.5x Barlow
Off Axis Guider and LoadstarX2 Guider
Focus: Starlight Feather Touch Focusers and Boss II Focus Control
Aurora flat-field light panel
Software: SGP; PHD2; MaximDL; FocusMax; SkyX; iCAP; PixInsight; Photoshop; Registax

 

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