Celestial hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  Butterfly Cluster  ·  M 6  ·  NGC 6405
M6 - The Butterfly Cluster, lefty7283
M6 - The Butterfly Cluster
Powered byPixInsight

M6 - The Butterfly Cluster

M6 - The Butterfly Cluster, lefty7283
M6 - The Butterfly Cluster
Powered byPixInsight

M6 - The Butterfly Cluster

Equipment

Loading...

Acquisition details

Loading...

Description

I decided to knock out 4 of the low declination Messier clusters in one night. Being on a beach facing south really helped out with the light pollution, and I only needed so sink a half hour into each of the clusters, compared to the hour I'd normally do from my bortle 7 apartment roof. Unfortunately my guide camera refused to talk to my laptop, so my telescope was at the mercy of the wind.

---

**[Equipment:](https://i.imgur.com/6T8QNsv.jpg)**

* 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 31mm Ha 5nm, Oiii 3nm, Sii 5nm

* ~~Agena 50mm Deluxe Straight-Through Guide Scope~~

* ~~ZWO ASI-120MC for guiding~~

* Moonlite Autofocuser

**Acquisition:** 29 minutes (Camera at Unity Gain, -15°C)

* Lum- 29x30"

* Red- 10x30""

* Green- 9x30"

* Blue- 10x30"

* Darks- 30

* Flats- 30 per filter

**Capture Software:**

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

**[PixInsight Processing](https://www.youtube.com/watch?v=E6vj_SEZ79k):**

* BatchPreProcessing

* StarAlignment

* [Blink](https://youtu.be/sJeuWZNWImE?t=40)

* ImageIntegration

* DynamicCrop

* DynamicBackgroundExtraction 2X

* **Luminance:**

* TGV/MMT Noise Reduction

* ArcsinhStretch

* HistogramTransformation

* **RGB:**

* LinearFit to green

* ChannelCombination

* AutomaticBackgroundExtraction



* PhotometricColorCalibration

* SCNR

* HSVRepair

* ArcsinhStretch

* HistogramTransformation

* LRGBCombination with Lum

* [Curve](https://i.imgur.com/mrQbwCi.jpg)Transformations

* HistogramTransformation

* MorphologicalTransformation to reduce star sizes

* Annotation

Comments

Sky plot

Sky plot

Histogram

M6 - The Butterfly Cluster, lefty7283