Celestial hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  Hercules Globular Cluster  ·  IC 4614  ·  IC 4615  ·  IC 4617  ·  M 13  ·  NGC 6196  ·  NGC 6205  ·  NGC 6207
M13 - The Great Globular Cluster in Hercules, lefty7283
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M13 - The Great Globular Cluster in Hercules

M13 - The Great Globular Cluster in Hercules, lefty7283
Powered byPixInsight

M13 - The Great Globular Cluster in Hercules

Equipment

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Acquisition details

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Description

I decided to go for some saturated stars in this image. I'm fairly satisfied with the results for only an hour of data from my light polluted apartment. If you're curious, [here is the location of the 'propeller' commonly seen visually in this cluster](https://i.imgur.com/yrr4E48.png). An annotated image can be [found here.](https://i.imgur.com/PqtBwx6.jpg) It's fun to look at all of the tiny and faint galaxes in the background of this region of sky. Captured on the morning of March 7th, 2019 from a bortle 7 zone.



**Equipment:**

* TPO 6" F/4 Imaging Newtonian

* Orion Sirius EQ-G

* ZWO ASI1600MM-Pro

* Skywatcher Quattro Coma Corrector

* ZWO EFW 8x1.25"/31mm

* Astronomik LRGB Filters- 31mm

* Agena 50mm Deluxe Straight-Through Guide Scope

* ZWO ASI-120MC for guiding

* Moonlite Autofocuser

**Acquisition:** 1 hour 1 minute (Camera at Unity Gain, -20°C)

* Lum- 29x60"

* Red- 11x60"

* Green- 10x60"

* Blue- 11x60"

* Darks- 30

* Flats- 30 per filter

**Capture Software:**

* EQMod mount control. Captured using [N.I.N.A.](https://nighttime-imaging.eu/) and PHD2 for guiding and dithering.

**[PixInsight Processing](https://i.imgur.com/PX0geeL.png):**

* BatchPreProcessing

* StarAlignment

* ImageIntegration

* DynamicCrop

* DynamicBackground Extraction

* **Luminance:**

* AutomaticBackgroundExtraction

* TVG/MMT Noise Reduction

* HistogramTransformation

* **RGB:**

* LinearFit to Green

* ChannelCombination

* PhotometricColorCalibration

* DynamicBackgroundExtraction

* SCNR

* HSV Repair

* ArcsinhStretch

* HistogramTransformation

* LRGBCombination with Luminance

* ACDNR

* [Curves](https://i.imgur.com/DKrxcfa.jpg)Transformations

* LocalHistogramEqualization

* AdvStarMask

* MorphologicalTransformation

* Annotation

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