Antares and the Rho Ophiuchi Region (fewayne)

Celestial hemisphere: Southern · Constellation: Ophiuchus (Oph) · Contains: IC 4592 · IC 4601 · IC 4603 · IC 4604 · IC 4605 · M 4 · NGC 6121 · Part of the constellation Scorpius (Sco) · The star Al Niyat (σSco) · The star Antares (αSco) · The star Dschubba (δSco) · The star Graffias (β1Sco) · The star θOph · The star νSco · The star πSco · The star ρSco · The star τSco · The star ω1Sco · rho Oph Nebula

Antares and the Rho Ophiuchi Region, fewayne

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Antares and the Rho Ophiuchi Region

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Antares and the Rho Ophiuchi Region

This is a composite of two night's work with a Pentax DLSR and 50mm macro lens. The Rho region has the greatest variety of bright objects in a single field of any part of the northern hemisphere's sky. Reflection nebulae, the Antares emission nebula, clusters, you name it, this has got it.

I traveled north a few hundred miles to find good dark-sky conditions with an unobstructed horizon. From 45° North, though, Rho is pretty low on the horizon and so I had to deal with amazing bright green airglow. I worked on this image much more heavily in Photoshop than is my wont, healing a rift where the two nights' images joined, correcting stubborn patches of green glow, getting rid of walking noise, etc.

The first night I worked with the camera mounted my CEM70 GEM, with autoguiding. The second night, I had the camera on a tripod, and used the O-GPS1 AstroTracer feature to compensate for sidereal motion.

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Status	Basic success
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Astrometry.net job	4658619
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Antares and the Rho Ophiuchi Region

Antares and the Rho Ophiuchi Region

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Antares and the Rho Ophiuchi Region

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