Hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  IC 4603  ·  IC 4604  ·  IC 4605  ·  M 4  ·  M 80  ·  NGC 6093  ·  NGC 6121  ·  NGC 6144  ·  Part of the constellation Scorpius (Sco)  ·  The star 13Sco  ·  The star 22Sco  ·  The star Al Niyat (σSco)  ·  The star Antares (αSco)  ·  The star οSco  ·  The star ρOph  ·  The star τSco  ·  The star ωOph  ·  rho Oph nebula
Getting plate-solving status, please wait...
Rho Ophiuchi, 


            Jim Matzger
Rho Ophiuchi
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Rho Ophiuchi

Getting plate-solving status, please wait...
Rho Ophiuchi, 


            Jim Matzger
Rho Ophiuchi
Powered byPixInsight

Rho Ophiuchi


Imaging Telescopes Or Lenses
Rokinon 135mm f/2.0 ED UMC Telephoto ROKINON
Imaging Cameras
QSI 583ws QSI
Astrodon LRGB Astrodon Gen2E LRGB · Luminance · Red · Green · Blue
Adobe Photoshop · Diffraction Limited Maxim DL · PixInsight

Acquisition details

April 4, 2016
Blue: 8x150" (20') bin 1x1
Blue: 6x300" (30') bin 1x1
Green: 8x150" (20') bin 1x1
Green: 6x300" (30') bin 1x1
Luminance: 20x300" (1h 40') bin 1x1
Red: 14x300" (1h 10') bin 1x1
4h 30'
Avg. Moon age:
26.12 days
Avg. Moon phase:

Basic astrometry details

Astrometry.net job: 1180923

RA center: 16h25m37s.7

DEC center: -24°2728

Pixel scale: 8.621 arcsec/pixel

Orientation: 90.147 degrees

Field radius: 4.986 degrees

Resolution: 3326x2504

Locations: Deep Sky West Remote Observatory (DSW), Rowe, New Mexico, United States



From Wikipedia:

"The Rho Ophiuchi cloud complex is a dark nebula of gas and dust that is located 1° south of the star ρ Ophiuchi of the constellation Ophiuchus. At an estimated distance of 131 ± 3 parsecs, this cloud is one of the closest star-forming regions to the Solar System.

This cloud covers an angular area of 4.5° × 6.5° on the celestial sphere. It consists of two major regions of dense gas and dust. The first contains a star-forming cloud (L1688) and two filaments (L1709 and L1755), while the second has a star-forming region (L1689) and a filament (L1712–L1729). These filaments extend up to 10–17.5 parsecs in length and can be as narrow as 0.24 parsecs in width. Some of the structures within the complex appear to be the result of a shock front passing through the clouds from the direction of the neighboring Sco OB2 association.

Temperatures of the clouds range from 13–22 K, and there is a total of about 3,000 times the mass of the Sun in material. Over half of the mass of the complex is concentrated around the L1688 cloud, and this is the most active star-forming region.[3] There are embedded infrared sources within the complex. A total of 425 infrared sources have been detected near the L1688 cloud. These are presumed to be young stellar objects, including 16 classified as protostars, 123 T Tauri stars with dense circumstellar disks, and 77 weaker T Tauri stars with thinner disks. The last two categories of stars have estimated ages ranging from 100,000 to a million years."



  • Rho Ophiuchi, 


            Jim Matzger
  • Final
    Rho Ophiuchi, 


            Jim Matzger

Sky plot

Sky plot


Rho Ophiuchi, 


            Jim Matzger