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Author Topic: Sharpless 171  (Read 211 times)

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Offline petevasey

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Sharpless 171
« on: 13:12:07, 28 December, 2017 »
And it's little friend SH170.   A very large (around 3 degrees square) emission nebula in Cepheus, well placed for the lovely clear night last night which although well moonlit allowed narrow band filters to do their job.  I've messed around with colour quite a lot, but I think the monochrome stands up pretty well on its own.  So here are both.  Colour started off as the Hubble palette SHO.

Incidentally the boundary between Cepheus and Cassiopeia passes right across 171, so 170 is in Cassiopeia.

QSI 683 on Canon 70-200 f4 L zoom lens at 200 mm, with external mask to stop down to approx. f6.  Ha 16 x 20 minutes, SII and OIII each 5 x 20 minutes, all unbinned.  Larger images on my web page.
 
Cheers,

Peter
Telescopes: GSO RC10 Truss, Meade S5000 127, TMB 105, TS65 Quad, Solarscope SV50
Binoculars: Canon 15x50 IS
Camera lenses: Canon 400L f5.6, Canon 70-200L f4 zoom, various old M42 thread
Cameras: QSI 683wsg, SX AO, LodestarX2, Artemis285, Canon 350D (modded), Canon 700D, GPCAM2 (colour), GPCAM2 (mono), LE Vesta Pro, Toucam.
Mounts:  Gemini G41 with Pulsar controller. EQ6 Pro, EQ3-2 with Autostar. Star Adventurer
Observatory: 8' Astronomydome

Offline chris.bailey

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Re: Sharpless 171
« Reply #1 on: 17:21:00, 28 December, 2017 »
Very nice Pete. Its a lovely target that is so rarely imaged. The two together should be The Question Mark Nebula.

Chris
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Offline PaulB

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Re: Sharpless 171
« Reply #2 on: 17:41:38, 28 December, 2017 »
That is a very good name, Chris.

I prefer the monochrome version of this nebula.

It is one object that I don't know. I will add this to my to-do list.
Paul.
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Offline Eccoskies

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Re: Sharpless 171
« Reply #3 on: 17:48:43, 28 December, 2017 »
Very nice Pete. The colour version gives it quite a punch  :thumbup:

Mark
Mark
53N 1W

Pair of binos and a beer

 

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