M108 revisited (Frank Colosimo)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 108 · NGC 3556

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M108 revisited

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M108 revisited

Messier 108 (M108, NGC 3556) is an edge-on spiral galaxy in Ursa Major situated near the bright star Beta Ursa Majoris and close to the Owl Nebula, M97, only 48' away. It has a visual magnitude 10. It is about 45 million light years away and is a member of the Ursa Major group, a rather loose collection of galaxies.

The nearly edge-on galaxy appears to have no bulge and no pronounced core at all. The dust lane, H2 regions, and star clusters provide a jumbled and chaotic appearance, but show a lot of resolved detail. This is my second attempt at this object. I think I have a wider field and better color but possibly not the resolution of my last attempt.

Date: Jan-Mar 2019

Location: New Ringgold PA

Optics: LUM: Starizona Hyperion f/8 12.5 inch, FL 2540 mm

Mount: LUM: Paramount ME

Camera: LUM: Apogee U8300

Guiding: ST-402 on Innovations Foresight On-Axis Guider

Optics: RGB: Celestron EdgeHD 1100

Mount: RGB: Paramount MX

Camera: RGB:Sbig STL-11000

Exposure: LRGB (unbinned): L:69x10 R:20x10 min, G:6x10 min, B:20x10 min Total 19.2 hrs 115 subs at avg 600 sec

Processing: Image acquisition using CCD Autopilot. Initial processing was done using Maxim DL with subsequent processing with Photoshop.

Northeast Imagers
Cloudy Nights
Schmidt-Cassegrain Telescope (SCT) Imagers

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Status	Advanced success
Started	...
Astrometry.net job	2593882
PixInsight job	E35A5XK8EYA65314LX7D56F52IMXB6LC
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h11m27s.557
RA (top/left)	11h12m38s.230
RA (top/right)	11h10m02s.553
RA (bottom/right)	11h10m17s.478
RA (bottom/left)	11h12m52s.106

Dec (center)	+55°40′07″.16
Dec (top/left)	+55°49′15″.52
Dec (top/right)	+55°46′22″.89
Dec (bottom/right)	+55°30′56″.17
Dec (bottom/left)	+55°33′47″.65

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M108 revisited

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M108 revisited

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