Sharpless 112 (SH2-112)

[steppenwolf]

SH2-112

Description

This rather beautiful object lies approximately 5,500 light years away within the constellation of Cygnus about 1.3° west-northwest of the bright star Deneb. The nebula’s emissions are driven by the mag. +9.2 star BD+45 3216 which is approximately 30x brighter than our own Sun and Ha dominates here substantially. There is a dark band of dust to the nebula’s western side orientated north-south.

I really struggled to get adequate OIII data for this object in the last month so the 21 subframes used for the OIII portion of this image were captured over 5 tortuous nights of imaging while dodging clouds. However, in the end I captured enough to produce a worthwhile image when combined with the much easier Ha data to produce this bi-colour image. Ha was mapped to the Red channel and OIII was mapped to both the Green and Blue channels.

Ha/OIII/OIII version

On the subject of Ha, a mono image of this object using just Ha data shows some really lovely detail in the nebula itself as well as in the background sky as shown below.

Ha only version

Image Stats

Mount: Mesu 200
Telescope: Sky-Watcher Esprit 150
Flattener: Sky-Watcher Esprit specific
Camera: QSI 683 WSG-8
Filters: Astrodon 3nm Ha, 3nm OIII
Subframes: 22 x 1800 sec Ha, 21 x 1800 sec OIII
Total Integration: 21.5 hours
Control: CCD Commander
Capture: MaxIm DL
Calibration, Stacking and Deconvolution: PixInsight
Post-Processing: PhotoShop PS3

Location

Constellation	Cygnus
RA	20° 34' 38.0"
DEC	+45° 43' 17.0"
Distance	~5500ly

 

 

 

[MarkAR]

Very nicely done, love the peachy copper tones and the pale blue just showing in the centre.

[Stargazer33]

I think I actually prefer the mono image. Worthy of APotY! 

[alan potts]

Lovely shot Steve, can't recall seeing that one done before.

Alan

[AstroNtinos]

Thanks for the image and the nebula’s location. The image is amazing.

[callisto]

10 hours ago, Stargazer33 said:

I think I actually prefer the mono image. Worthy of APotY! 

+1 for the mono........nicely done Steve

 

Mark

[inFINNity Deck]

Hi Steve,

very nice image. Do you guide and, if so, what type of guide scope do you use for the 150ED?

Nicolàs

 

[simmo39]

New one to me, brilliant image!

[steppenwolf]

14 hours ago, MarkAR said:

Very nicely done, love the peachy copper tones and the pale blue just showing in the centre.

Thank you, I think this palette works well with this object.

13 hours ago, Stargazer33 said:

I think I actually prefer the mono image. Worthy of APotY!

I too really like the mono version - Ha mono images can be very captivating!

7 hours ago, alan potts said:

Lovely shot Steve, can't recall seeing that one done before.

Thanks, Alan, for some reason, it isn't a very popular object to image but it was well worth persevering with for me.

5 hours ago, AstroNtinos said:

Thanks for the image and the nebula’s location. The image is amazing.

Thank you!

1 hour ago, inFINNity Deck said:

Do you guide and, if so, what type of guide scope do you use for the 150ED?

Oh yes, Nicolàs, I do guide but I don't use a guide scope as I have an off-axis guider (OAG).

1 hour ago, simmo39 said:

New one to me, brilliant image!

Thank you, I'm pleased you like the image and that you have been introduced to something new.

[rubecula]

Wonderful image.  Colour for me, that small amount of blue really brings the image to life.  Another one for the list, thank you,\.

[tooth_dr]

I’ve only seen this in a widefield image, so a real treat to see it close up!  Wonderful job Steve, do like the colour image and the soft tones. 

[MarsG76]

What a great looking image.... now I'm wondering if I could see if from Sydney?

 

[Tom OD]

great shot, and one I  m not sure I ve seen before which is always a treat.

Tom

[ollypenrice]

Beautifully done, Steve, and an original choice. Clean as a whistle.

Olly

[steppenwolf]

Thanks, Olly, sorry for the late response - I do like these SH catalogue objects. I have been trying for SH2-132 (Lion’s Head nebula) but believe it or not, the gazebo adjacent to my observatory is star spiking the stars so I’ll have to wait for it to move round a fair bit!!!