Cygnus Loop Clock
Designed and sold by ShinyPhoto
$38.60
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$38.60
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Product features
- It's always art o'clock when your clock is a work of art
- Printed polypropylene face made for you when you order
- Metal hands in your choice of colors
- Bamboo wood frame in black, white, or natural finish
- Quartz clock mechanism for accurate timekeeping
- Clear plexiglass lens
- Built-in rear hook, ready to hang
- AA battery not included
- Since every item is made just for you by your local third-party fulfiller, there may be slight variances in the product received
Cygnus Loop
Around 725pc (2400ly) distant, the Cygnus Loop (aka Sharpless Sh2-103) is an emission nebula in Cygnus measuring nearly 3° across, a large supernova remnant caused by a star around 12-15 solar masses (as yet unidentified).
I've had it in mind to make a photo of this entire loop for some months. This was comparatively tricky - with the appalling weather this summer, I decided OSC was the way to shoot it and preferably all in one frame without relying on a mosaic. Accordingly, I rigged-up a new astro-camera (the RisingCam IMX571 OSC) to my old Sigma 100-400mm (EF-mount) lens.
I also upgraded my dual-narrowband filter from the Optolong L-eNhance (which passes H-beta, making it not pure dual-NB) to the IDAS NBZ (which is pure Ha & OIII only, with no flare on bright stars).
It's been fun watching this come together. Initial attempts using 180s subs proved too dark, so I abandoned them and spent a couple of hours each of several nights shooting 300s subs instead.
Finally, in processing, experiments with background neutralization revealed far more nebula tendrils than I'd expected. I'd been looking for a coat-hook/screw shape with the bulk of the Eastern and Western Veil nebulae including the Witch's Broom nebula on the right, along with a "tail" toward the botom, but was not prepared to find an extra halo of Ha in an arc around the top of the structure.
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