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Contains:  IC 3583, M 58, M 59, M 60, M 89, M 90, NGC 4550, NGC 4551, NGC 4552, NGC 4569, NGC 4579, NGC 4606, NGC 4607, NGC 4621, NGC 4637, NGC 4638, NGC 4647, NGC 4649
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M58, M59, M60, M89, and M90 (2 panel mosaic), 



    
        

            lefty7283
M58, M59, M60, M89, and M90 (2 panel mosaic)
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M58, M59, M60, M89, and M90 (2 panel mosaic)

Technical card


Dates:March 5, 2019March 6, 2019March 17, 2019

Frames:
Astronomik B 31 mm Type IIc: 78x60" (gain: 139.00) -20C
MrStarGuy CLS-CCD 2": 144x180" (gain: 139.00) -20C
Astronomik G 31 mm Type IIc: 78x60" (gain: 139.00) -20C
Astronomik R 31 mm Type IIc: 78x60" (gain: 139.00) -20C

Integration: 11.1 hours

Darks: ~30

Flats: ~30

Avg. Moon age: 22.85 days

Avg. Moon phase: 27.84%

Bortle Dark-Sky Scale: 7.00


Basic astrometry details

Astrometry.net job: 3173704

RA center: 12h 39' 11"

DEC center: +12° 4' 48"

Pixel scale: 1.299 arcsec/pixel

Orientation: 137.230 degrees

Field radius: 1.533 degrees


Resolution: 7920x3064

Data source: Backyard

Description

This is my first attempt at making an astrophotography mosaic. I'm on a hunt to image all of the Messier objects, and I decided to knock out 5 in one image. [Here's a link to an annotated image](https://i.imgur.com/0jP83hW.jpg). Every one of these is a galaxy (The annotations arent perfectly aligned on the right side of the image, due to some mosaic overlap). Captured on March 5th, 6th, and 17th, 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+CLS Filters- 31mm

* Astrodon H-alpha 5nm 31mm

* Agena 50mm Deluxe Straight-Through Guide Scope

* ZWO ASI-120MC for guiding

* Moonlite Autofocuser

**Acquisition:** 11 hours 06 minutes (Camera at Unity Gain, -20°C)

* Panel 01 (5h 36m)
* CLS- 72x180"

* Red- 40x60"

* Green- 41x60"

* Blue- 39x60"

* Panel 02 (5h 30m)

* CLS- 72x180"

* Red- 38x60"

* Green- 37x60"

* Blue- 39x60"

* 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/eCzORi5.png):**

* BatchPreProcessing

* StarAlignment

* Blink

* ImageIntegration

* DynamicCrop

* DynamicBackgroundExtraction 3X

* **Luminance:**

* StarAlignment to make a rough mosaic (used for actual mosaic. [Gradient merge mosaic created double stars in the overlaps](https://i.imgur.com/TJnH6uO.png), likely due to slight coma distortions)

* DynamicCrop

* DynamicBackgroundExtraction

* PSFImage

* ADVStarMask

* RangeSelection+CloneStamp

* Deconvolution

* TVG/MMT noise reduction

* HistogramTransformation

* StarAlignment and crop to RGB

* **RGB:**

* LinearFit to green

* ChannelCombination

* StarAlignment to make a rough mosaic (same as luminance)

* DynamicCrop

* DynamicBackgroundExtraction

* PhotometricColorCalibration

* SCNR

* HSV Repair

* ArcsinhStretch

* HistogramTransformation

* StarAlignment and crop to Lumance

* LRGBCombination with Luminance

* [Curve](https://i.imgur.com/Hs17GaF.jpg)Transformtaions

* AutomaticBackgroundExtraction

* Extract L channel and LRGBCombination for chrominance noise reduction

* Annotation

Comments

Author

lefty7283
lefty7283
License: None (All rights reserved)
190
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M58, M59, M60, M89, and M90 (2 panel mosaic), 



    
        

            lefty7283