M13 (Tom Engwall)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: HD150679 · HD150998 · Hercules Globular Cluster · IC 4617 · M 13 · NGC 6205 · NGC 6207

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M13

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M13

This turned out to be more of a challenge for me than I had anticipated. After preporcessing (including local normalization) and integration in Pixinsight, I fouund that my RGB cmbined image had a very bright and colorful background but I did finaly manage to get the background under control with HT. I'm still not sure why I had that bright colorful backround but my suspicion is that it was due to the exposure length. I used 180 seconds but with the ASI 2600 mm pro, I probably could have gone much shorter. I also wonder if there was something that I could have done in with the normalization settings in WBPP. I'm not sure but nevertheless, I am generally satisfied with this output. I use HDRMT on the luminance master before combining it with the RGB and that seemed to be very effective in bringing out detail in the core. I'm particularly pleased with my framing because I wanted to capture the nearby galaxies NGC 6207 and the very small one C4617. You can zoom in on NGC 6207 and see some detail. This image is cropped slightly as well. The exposures were as follows:

lum 168 x 180s
Red 140 x 180s
Green 155 x 180s
Blue 151 x 180s

PixelSkiesAstro

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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Status	Advanced success
Started	...
Astrometry.net job	5948713
PixInsight job	JJZD5OYJWLAED9QYFDREIUY1BAPYF5KF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h41m40s.689
RA (top/left)	16h39m49s.369
RA (top/right)	16h40m07s.263
RA (bottom/right)	16h43m30s.779
RA (bottom/left)	16h43m15s.304

Dec (center)	+36°28′06″.70
Dec (top/left)	+36°54′12″.29
Dec (top/right)	+35°59′21″.47
Dec (bottom/right)	+36°01′51″.45
Dec (bottom/left)	+36°56′44″.13

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