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





    
        

            Jim Matzger
Rho Ophiuchi

Rho Ophiuchi

Technical card

Resolution: 3326x2504

Dates:April 4, 2016

Frames:
Blue: 8x150" bin 1x1
Blue: 6x300" bin 1x1
Green: 8x150" bin 1x1
Green: 6x300" bin 1x1
Luminance: 20x300" bin 1x1
Red: 14x300" bin 1x1

Integration: 4.5 hours

Avg. Moon age: 26.12 days

Avg. Moon phase: 12.57%

Astrometry.net job: 1180923

RA center: 246.407 degrees

DEC center: -24.458 degrees

Pixel scale: 8.621 arcsec/pixel

Orientation: 90.147 degrees

Field radius: 4.986 degrees

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

Data source: Unknown

Description

www.astrolavistaobservatory.com

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."

Comments

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blueangel
Jim Matzger
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            Jim Matzger
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Rho Ophiuchi, 





    
        

            Jim Matzger