Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  The star 25Cep
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Sh2-140 / Sh2-145 HII emission nebulae in Cepheus, 



    
        

            Herwig Peresson
Sh2-140 / Sh2-145 HII emission nebulae in Cepheus
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Sh2-140 / Sh2-145 HII emission nebulae in Cepheus

Getting plate-solving status, please wait...
Sh2-140 / Sh2-145 HII emission nebulae in Cepheus, 



    
        

            Herwig Peresson
Sh2-140 / Sh2-145 HII emission nebulae in Cepheus
Powered byPixInsight

Sh2-140 / Sh2-145 HII emission nebulae in Cepheus

Equipment

Imaging Telescopes Or Lenses
Takahashi Epsilon 130D
Imaging Cameras
ZWO ASI 1600MM cool
Mounts
Avalon Instruments M-Zero
Filters
ZWO Luminance 31 mm · ZWO H-alpha 7nm · ZWO RGB 31 MM
Accessories
ZWO Filterwheel 8x31mm
Software
Adobe Photoshop CS5 CS5 · PixInsinght
Guiding Telescopes Or Lenses
Skywatcher 8x50 Finder
Guiding Cameras
ZWO ASI120MM

Acquisition details

Dates:
Oct. 2, 2017 ·  Oct. 14, 2017 ·  Oct. 15, 2017 ·  Aug. 6, 2020 ·  Sept. 21, 2020
Frames:
ZWO H-alpha 7nm: 655x120" (21h 50') bin 1x1
ZWO Luminance 31 mm: 148x30" (1h 14') bin 1x1
ZWO RGB 31 MM: 625x30" (5h 12' 30") bin 1x1
Integration:
28h 16' 30"
Avg. Moon age:
16.60 days
Avg. Moon phase:
50.00%

Basic astrometry details

Astrometry.net job: 5143663

RA center: 22h20m40s.8

DEC center: +63°2822

Pixel scale: 1.814 arcsec/pixel

Orientation: 0.178 degrees

Field radius: 1.427 degrees

Resolution: 4569x3345

Locations: Rooftop Terrace, Vienna - City Center, Austria

Data source: Backyard

Description

The image shows the HII emission nebulae Sharpless Sh2-145 to the left, and Sh2-140 to the right of the dark molecular cloud LDN 1204 in the center of the image. The radiation from the young stars in the open star cluster Pismis-Moreno1 generate a bright ionisation front at the margin of Sh2-140 towards the dark molecular cloud LDN 1204. Distance to Sh2-140 is approximately 2900 light years.

The LRGB image is enhanced with Ha frames to bring out the HII emission nebulae. Some very colourful stars speckle this part of the sky.

The integrated image of total 28 hours consists of frames from five different nights from 2017 and 2020. Since I was still using the first generation of ZWO filters, there are pronounced halos around the bright stars.

Taken with the Takahashi Epsilon-130D and ZWO ASI 1600mm camera as always from the city center of Vienna, Austria.

Comments

Revisions

  • Final
    Sh2-140 / Sh2-145 HII emission nebulae in Cepheus, 



    
        

            Herwig Peresson
    Original
  • Sh2-140 / Sh2-145 HII emission nebulae in Cepheus, 



    
        

            Herwig Peresson
    B

B

Description: Annotated image

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Sh2-140 / Sh2-145 HII emission nebulae in Cepheus, 



    
        

            Herwig Peresson