Hemisphere:  Northern  ·  Constellation: Virgo (Vir)  ·  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
M58, M59, M60, M89, and M90 (2 panel mosaic), 



    
        

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

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

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



    
        

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

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

Technical card

Imaging telescopes or lenses: TPO 6" f/4 Newtonian

Imaging cameras: ZWO ASI1600MM-Pro

Mounts: Orion Sirius EQ-G

Guiding telescopes or lenses: Agena 50mm Deluxe Straight-Through Finder / Guide Scope with Helical Focuser

Guiding cameras: ZWO ASI1600MM-Pro

Software: Nighttime Imaging 'N' Astronomy  ·  PixInsight 1.8 Ripley PixInsight

Filters: Astronomik CCD CLS  ·  Astronomik B 31 mm Type IIc  ·  Astronomik G 31 mm Type IIc  ·  Astronomik R 31 mm Type IIc

Accessory: ZWO EFW 8 x 1.25″/31mm  ·  Moonlite Model CR Newtonian 2" Format Focuser  ·  SkyWatcher Quattro Coma Corrector


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

Frames:
Astronomik B 31 mm Type IIc: 78x60" (1h 18') (gain: 139.00) -20C
Astronomik G 31 mm Type IIc: 78x60" (1h 18') (gain: 139.00) -20C
Astronomik R 31 mm Type IIc: 78x60" (1h 18') (gain: 139.00) -20C
MrStarGuy CLS-CCD 2": 144x180" (7h 12') (gain: 139.00) -20C

Integration: 11h 6'

Darks: ~30

Flats: ~30

Avg. Moon age: 22.85 days

Avg. Moon phase: 27.84%

Bortle Dark-Sky Scale: 7.00


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