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Contains:  IC 4605, NGC 6144, rho Oph nebula, IC 4604, IC 4603, M 4, NGC 6121, The star 22Sco, The star Antares (αSco), The star ρOph, The star Al Niyat (σSco), The star οSco
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Antares and Rho Ophiuchi @ 200mm, 


            Gabriel R. Santos...
Antares and Rho Ophiuchi @ 200mm

Antares and Rho Ophiuchi @ 200mm

Technical card

Resolution: 1350x899

Dates:July 23, 2014

Frames: 7x60" ISO1600

Integration: 0.1 hours

Darks: ~5

Avg. Moon age: 26.40 days

Avg. Moon phase: 10.70%

Temperature: 6.60 job: 340960

RA center: 246.867 degrees

DEC center: -24.904 degrees

Orientation: 123.814 degrees

Field radius: 3.940 degrees


My image of this beautiul image of the night sky. Now, a close up of this stunning Cloud Complex. The bright yellow star is Antares, Alpha Scorpii; and the blue star due left is Rho Ophiuchi. This set is, in my opinion, far from perfect.

This was planned to be a 30 minutes set (30x60s lights); but, in the 8th light frame, I unfortunately bumped into the Dew Heater Power Suply Cable. The Dew Heater was wrapped around the front element of my 70-200mm Lens... and, for my lens, around the Focus Ring. When the Dew Heater was pulled, the focus ring rotated just a bit, but the images were completely unusable. I dind't noticed until finishing the set, when the last picture was taken and I saw on my camera screen that the stars were out of focus.

So, this set became just a 7-frame set, only 7 minutes of integration! This is amost 1/5th of what would be necessary to show up the details in all those Dust Areas. The result wasn't as expected, once I had to really stretch the image to show details. But, one lesson was learned: Always take care of your's dew heater cord!

Camera: Unmodded T4i/650D at ISO 1600
Lens: Tamron 70-200mm f/2.8, at 200mm and f/3.2
Exposure Detail: 7x60s; or 7x1min; total 7 minutes.

*The -B- version of this image was stretched even more to show a bit more of details (but lots of noise)*
*The -C- version is a crop of the Antares M4 Area, in my opinion, the "best" part of my image*



Gabriel R. Santos...
License: None (All rights reserved)


  • Antares and Rho Ophiuchi @ 200mm, 


            Gabriel R. Santos...
  • Antares and Rho Ophiuchi @ 200mm, 


            Gabriel R. Santos...
  • Antares and Rho Ophiuchi @ 200mm, 


            Gabriel R. Santos...
  • Final
    Antares and Rho Ophiuchi @ 200mm, 


            Gabriel R. Santos...

Sky plot

Sky plot


Antares and Rho Ophiuchi @ 200mm, 


            Gabriel R. Santos...