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Contains:  IC 4605, NGC 6144, rho Oph nebula, IC 4604, IC 4603, M 4, NGC 6121, IC 4601, M 80, NGC 6093, The star 12Sco, The star ρOph, The star 22Sco, The star ψOph, The star οSco, The star 13Sco, The star ωOph, The star τSco, The star Al Niyat (σSco), The star Antares (αSco), Part of the constellation Scorpius (Sco)
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Rho Ophiuchi, 


            Onur Atilgan
Rho Ophiuchi

Rho Ophiuchi

Technical card

Imaging telescope or lens:Canon 200mm USM F2.8 L II

Mount:Sky-Watcher EQ6 Pro

Software:Pixinsight 1.8

Resolution: 5469x3648

Dates:June 29, 2019

Frames: 25x120" ISO3200

Integration: 0.8 hours

Darks: ~25

Bias: ~100

Avg. Moon age: 26.02 days

Avg. Moon phase: 13.31%

Bortle Dark-Sky Scale: 2.00

Mean SQM: 21.60

Temperature: 16.00 job: 2802243

RA center: 246.903 degrees

DEC center: -23.812 degrees

Pixel scale: 6.900 arcsec/pixel

Orientation: 89.288 degrees

Field radius: 6.301 degrees

Data source: Traveller


Location: Alacam Mountains, Dursunbey, Balikesir.

Version C is the luminance mask I produced while processing the image. I liked it so much that I wanted to share it as a version as well.



Onur Atilgan
License: Attribution-ShareAlike Creative Commons


  • Rho Ophiuchi, 


            Onur Atilgan
  • Final
    Rho Ophiuchi, 


            Onur Atilgan
  • Rho Ophiuchi, 


            Onur Atilgan

Sky plot

Sky plot


Rho Ophiuchi, 


            Onur Atilgan