Hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  IC 4603  ·  IC 4604  ·  IC 4605  ·  M 4  ·  M 80  ·  NGC 6093  ·  NGC 6121  ·  NGC 6144  ·  The star 22Sco  ·  The star Al Niyat (σSco)  ·  The star Antares (αSco)  ·  The star οSco  ·  The star ρOph  ·  rho Oph nebula
 The Rho Ophiuchi Complex & Friends (M4, Antares, & Dust), 


 The Rho Ophiuchi Complex & Friends (M4, Antares, & Dust)
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The Rho Ophiuchi Complex & Friends (M4, Antares, & Dust)

Technical card

Imaging telescopes or lenses: Canon 200 mm f/2.8 L II USM

Imaging cameras: Canon EOS 350D mod. Baader

Mounts: Orion Atlas EQ-G

Guiding telescopes or lenses: Orion 80ED

Guiding cameras: Orion StarShoot Deep Space Color Imager

Software: Adobe CS3  ·  Digital Photo Professional  ·  EOS Utility  ·  Stark Labs DSLR Shutter  ·  Stark Labs PHD GUIDING

Frames: 62x240" (4h 8') ISO1600

Integration: 4h 8'

Bortle Dark-Sky Scale: 2.00

Basic astrometry details

Astrometry.net job: 215132

RA center: 16h 26' 3"

DEC center: -24° 50' 31"

Pixel scale: 18.428 arcsec/pixel

Orientation: 168.492 degrees

Field radius: 3.278 degrees

Resolution: 800x1000

Locations: Chiricahua Mtns - Dark Sky SIte, Dos Cabezas, None


This is my second time imaging this region of the night time sky. My first attempt was from my dark sky site in Michigan. The first attempt was plagued by my northern latitude, haze & humidity, and light domes.

This version is orders of magnitude better and will become better when I can add more data to the image. I would like to add enough data to have a total of ~7-9 hours. I will admit I should go back to the original data and reprocess this image as I am certain my processing skills have greatly improved since originally processing. This was processed with a traditional RGB edit of the stacked DSLR data.


Sky plot

Sky plot


 The Rho Ophiuchi Complex & Friends (M4, Antares, & Dust),