Hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  IC 4592  ·  IC 4601  ·  IC 4603  ·  IC 4604  ·  IC 4605  ·  M 4  ·  NGC 6121  ·  Part of the constellation Scorpius (Sco)  ·  The star 13Sco  ·  The star Al Niyat (σSco)  ·  The star Antares (αSco)  ·  The star εSco  ·  The star νSco  ·  The star τSco  ·  The star χOph  ·  The star ω1Sco  ·  The star ω2Sco  ·  The star ωOph  ·  rho Oph nebula
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Rho Oph, 


Rho Oph
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Rho Oph

Technical card

Imaging telescopes or lenses: SIGMA 85mm F1.4 DG HSM

Mounts: Sky-Watcher HEQ5 classic

Software: Pleaides PixInsight Core 1.8

Dates:June 30, 2017

Frames: 176x120"

Integration: 5.9 hours

Avg. Moon age: 6.88 days

Avg. Moon phase: 44.64%

Basic astrometry details

Astrometry.net job: 1637031

RA center: 16h 29' 24"

DEC center: -26° 27' 28"

Pixel scale: 19.491 arcsec/pixel

Orientation: 89.390 degrees

Field radius: 9.765 degrees

Resolution: 3000x2003

Data source: Traveller


I was hoping for a sharper image after all of the integration time put into it but it would appear that the UV/IR filter that I'd forgotten to remove added quite considerable optical defects. I've attempted to mask them as much as possible.


Sky plot

Sky plot


Rho Oph,