Author Topic: M106 NGC 4258  (Read 49 times)

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Apophis

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M106 NGC 4258
« on: Nov 02, 2017, 14:36:39 »
Had this since imaging in July but not good enough to post, reorocessed with the latest PS CC, and improved it a bit.

There were 3 large dust specks on it and processed them out nicely , interested if anyone can find where they were.
Roger

28 x 100 second subs
 no darks or flats that i can find.
 no bias

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JohnP

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Re: M106 NGC 4258
« Reply #1 on: Nov 02, 2017, 15:14:37 »
Definitely one 3 oclock position quarter way across from RHS about 1/2 way up... really stands out on my monitor...

Carole

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Re: M106 NGC 4258
« Reply #2 on: Nov 02, 2017, 15:35:35 »
I suspect near the bottom on both left and right, but you did a good job removing them.  This is a difficult target to get the outer spiral arms even with a CCD camera, so for a DSLR and a beginner you've done very well.

Carole

Apophis

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Re: M106 NGC 4258
« Reply #3 on: Nov 02, 2017, 17:20:31 »
The three i removed were a triangle around the spiral.
Thanks Carole n John p.
Roger
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MarkS

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Re: M106 NGC 4258
« Reply #4 on: Nov 02, 2017, 17:44:24 »
You've captured faint spiral arms there!

It looks slightly out of focus to me - you need to nail that focus.

Mark

Apophis

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Re: M106 NGC 4258
« Reply #5 on: Nov 02, 2017, 18:00:25 »
Yes at the time i didn't have a bahtinov but do now and always focus on my alignment star.
Roger
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JohnP

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Re: M106 NGC 4258
« Reply #6 on: Nov 02, 2017, 20:28:39 »
Also Roger when I stretch it loads in PS you can see double horizontal lines dividing image into thirds - what caused this? Just curious - John