Celestial hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  10 Sco)  ·  14 Sco)  ·  20 Sco)  ·  21 Sco)  ·  23 Sco)  ·  42 Oph)  ·  44 Oph  ·  45 Oph  ·  7 Oph  ·  9 Sco)  ·  Al Niyat (σ Sco  ·  Al Niyat (τ Sco  ·  Alniyat I  ·  Cor Scorpii  ·  IC 4592  ·  IC 4601  ·  IC 4603  ·  IC 4604  ·  IC 4605  ·  Kalb al Akrab (α Sco  ·  M 4  ·  NGC 6121  ·  Part of the constellation Scorpius (Sco)  ·  The star Alniyat  ·  The star Alniyat II  ·  The star Antares  ·  The star Garafsa (θ Oph  ·  The star Jabbah (ν Sco  ·  The star Jabhat Acrabi I (ω1 Sco  ·  The star Jabhat Acrabi II (ω2 Sco  ·  And 5 more.
Getting plate-solving status, please wait...
MW in Ophiuchus: a 9-panel mosaic, 



    
        

            Jan Scheers
MW in Ophiuchus: a 9-panel mosaic
Powered byPixInsight

MW in Ophiuchus: a 9-panel mosaic

Revision title: V7b alt

Getting plate-solving status, please wait...
MW in Ophiuchus: a 9-panel mosaic, 



    
        

            Jan Scheers
MW in Ophiuchus: a 9-panel mosaic
Powered byPixInsight

MW in Ophiuchus: a 9-panel mosaic

Revision title: V7b alt

Acquisition details

RA center: 16h48m34s.1

DEC center: -25°0238

Pixel scale: 12.159 arcsec/pixel

Orientation: 175.667 degrees

Field radius: 13.051 degrees

Resolution: 6132x4702

File size: 4.9 MB

Locations: El Sauce Observatory, Rio Hurtado, Coquimbo Region, Chile

Data source: Amateur hosting facility

Remote source: Telescope Live

Description

9-panel mosaic stretching from the core of the Milky Way in the Southern part of Ophiuchus to the Rho Ophiuchi cloud complex, the Blue Horsehead Nebula and many other deep-sky objects in this constellation (incl. a part of Scorpius with a.o. Antares).

It's probably one of my most ambitious & difficult astro-imaging projects to date.

All data was acquired with a Nikon 200 F/2 and FLI ML16200 camera from Telescope Live in El Sauce Observatory, Chile.
FOV: 473' x 378' for each panel. An overlap of 10% was chosen for all the panels used in this mosaic image.
The final image covers a wide field of this MW-region with a field radius of about 13 degrees (see sky map).

Jarmo Ruuth’s 'Astro Mosaic Telescope Planner' tool was used to calculate the mosaic coordinates for the different panels.  AstroMosaic Telescope Planner Info (ruuth.xyz)
Astro Pixel Processor (APP) was used for registrating, integrating and creating the mosaics. 
Post-processing was done in Photoshop CC incl. Astronomy Tools, Topaz Sharpen AI and NoiseXTerminator plug-ins.

Min. 2 subs of 300s with LRGB were used for each panel. 
Total integration time: 405 minutes.
LRGB: 22:21:19:19 sub-frames of 300s.

File size of the integrated images (for each color filter) was already 546Mb (about 140 Mpixels) and difficult to handle...
Therefore, I cropped, compressed (from 72 to 36 pixels / inch) & post-processed everything in Photoshop.

Comments

Revisions

  • MW in Ophiuchus: a 9-panel mosaic, 



    
        

            Jan Scheers
    Original
  • MW in Ophiuchus: a 9-panel mosaic, 



    
        

            Jan Scheers
    B
  • MW in Ophiuchus: a 9-panel mosaic, 



    
        

            Jan Scheers
    C
  • Final
    MW in Ophiuchus: a 9-panel mosaic, 



    
        

            Jan Scheers
    D

C

Title: Version 7 of this mosaic

Uploaded: ...

D

Title: V7b alt

Uploaded: ...

Sky plot

Sky plot

Histogram

MW in Ophiuchus: a 9-panel mosaic, 



    
        

            Jan Scheers