NGC 5676 - Unbarred Spiral in Boötes (rhedden)

NGC 5676 - Unbarred Spiral in Boötes

NGC 5676 is an unbarred, flocculent Sbc galaxy in the constellation Boötes first catalogued by William Herschel in 1787. Its visual magnitude is listed anywhere from 11.2 to 12.3 by various sources. NGC 5676 spans roughly 3.9’ by 1.7’ according to the data in this image. NGC 5676 appears to be mostly ruddy yellow with knotty H-alpha emissions poking through, in contrast to NGC 5660 (previous image in my gallery), which seemed abnormally blue when I processed it. Both images are cropped from the same LRGB composite, so I guess NGC 5660 really is quite blue in comparison.

The faint fuzzy on the left edge of the field has the designation MCG+08-27-001 or PGC 52050 and is a 17th magnitude galaxy of type SAdm, an unbarred Magellenic spiral. NGC 45 in Cetus is a better known example of this morphology. The faint fuzzy to the right side of the image has the designation SDSS J143148.41+492223.6 or PGC 4004479 and is designated as type Sm/Im.

This image is part 2 of a widefield galaxy project I started back in early March with the Esprit 100ED and QHY268M. The field of view is enormous compared to what I can achieve with my C11 EdgeHD, allowing many interesting galaxies to be imaged at the same time, but at somewhat lower resolution. As with the previous image, the luminance subs were 300 s in length, and I used Mode 3 (Extended Fullwell 2CMS), Gain 14, Offset 15 for image transfer. The RGB subs were 240 s in length, and they were shot with Mode 1, Gain 56, Offset 10. The luminance channel is a synthetic channel created by stacking 180 of the available frames using median combination. I applied 2x drizzle during stacking to achieve an image scale of 0.7” per pixel.

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Status	Basic success
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Astrometry.net job	5654857
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NGC 5676 - Unbarred Spiral in Boötes

NGC 5676 - Unbarred Spiral in Boötes

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NGC 5676 - Unbarred Spiral in Boötes

NGC 5676 - Unbarred Spiral in Boötes

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