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
Powered byPixInsight

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

Imaging Telescopes Or Lenses
TPO 6" f/4 Newtonian
Imaging Cameras
ZWO ASI1600MM-Pro
Mounts
Orion Sirius EQ-G
Filters
Astronomik B 31 mm Type IIc · Astronomik G 31 mm Type IIc · Astronomik R 31 mm Type IIc · Astronomik L 31mm Type IIc
Accessories
SkyWatcher Quattro Coma Corrector · ZWO EFW 8 x 1.25″/31mm · Moonlite Model CR Newtonian 2" Format Focuser
Software
Nighttime Imaging 'N' Astronomy · PixInsight 1.8 Ripley PixInsight
Guiding Telescopes Or Lenses
Agena 50mm Deluxe Straight-Through Finder / Guide Scope with Helical Focuser
Guiding Cameras
ZWO ASI 120 MC

Acquisition details

Dates:
March 7, 2019
Frames:
Astronomik B 31 mm Type IIc: 11x60" (11') (gain: 139.00) -20°C
Astronomik G 31 mm Type IIc: 20x60" (20') (gain: 139.00) -20°C
Astronomik L 31mm Type IIc: 29x60" (29') (gain: 139.00) -20°C bin 1x1
Astronomik R 31 mm Type IIc: 11x60" (11') (gain: 139.00) -20°C
Integration:
1h 11'
Darks:
30
Flats:
30
Avg. Moon age:
0.76 days
Avg. Moon phase:
0.64%
Bortle Dark-Sky Scale:
7.00

RA center: 16h41m43s.81

DEC center: +36°2732.7

Pixel scale: 1.299 arcsec/pixel

Orientation: -167.461 degrees

Field radius: 1.014 degrees

More info:Open 

Resolution: 4500x3370

Data source: Backyard

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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