Tag Archives: IC 4604

IC 4604 in Ophiuchus

4baab1ed6c154d2a2f332c7018c6de62.1824x0_q100_watermark_watermark_opacity-25_watermark_position-6_watermark_text-Copyright Jose Fco. del Aguila

Rho Ophiuchi is a triple star system located at the southern end of the constellation Ophiuchus near de limit with Scorpius.
The stars are embedded in a large blue reflection nebulosity catalogued as IC 4604 which is mixed with several filaments of dark nebulae. This region is also part of a larger dust and nebulosity region known as the Rho Ophiuchus / Antares complex.

Imaging telescopes or lenses: Sky-Watcher 200/1000 Black Diamond
Imaging cameras: Canon EOS 450D
Mounts: CGEM
Guiding telescopes or lenses: Lunatico Astronomia EZG-60
Guiding cameras: ZW Optical ASI120MC
Software: PHD Guiding, Incanus APT – Astro Photography Tool, PixInsight Core 1.8
Accessories: Baader MPCC Corrector de Coma
Dates: May 3, 2014
Frames: 7×600″ ISO1600
Integration: 1.2 hours
Darks: ~15
Flats: ~20
Bias: ~150

Author: Jose Fco. Del Aguila
AstroPhotography of the day by SPONLI 08 May 2014

The Antares and Rho Ophiuchi Region

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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.

The bright blue reflection nebula at the top, IC 4604, is associated with the triple star, Rho Ophiuchi.  Antares (Alpha Scorpii) is surrounded by a yellow area of nebulosity, IC 4606. Antares is 60,000 times brighter than our sun, and is so large that its disc can be easily measured – if it were in our solar system it would almost reach to Jupiter.

Nikon d7000
Nikkor 180mm F/2.8 @ f/4.0
85x30s at iso 2000
45x120s at iso 1250
10x240s at iso 1250
Dates: March 14, 2013

Autor: Jan Curtis

AstroPhotography of the day by SPONLI

31 January 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.