The Rosette/Skull Nebula in HaRGB (lefty7283)

The Rosette/Skull Nebula in HaRGB

Although I love how the nebulosity turned out on this, I ended up with some glow around some brighter stars that I could not manage to process out. Can't see the skull in the picture? [It is orientated roughly like this image of a skull](https://i.imgur.com/z1KGHqV.png) Captured on January 21st and 24th, 2019 from a bortle 7 zone

**Equipment:**

* TPO 6" F/4 Imaging Newtonian

* Orion Sirius EQ-G

* ZWO ASI1600MM-Pro

* ZWO EFW 8x1.25"/31mm

* Astrodon H-alpha 5nm 31mm

* Astronomik LRGB Filters- 31mm Mounted

* Agena 50mm Deluxe Straight-Through Guide Scope

* ZWO ASI-120MC for guiding

* Deep Sky Dad Autofocuser

**Acquisition:** 5 hours 11 minutes (Camera at Unity Gain, -20°C)

* Ha- 37x300"

* Red- 45x60"

* Green- 41x60"

* Blue- 40x60"

* Darks- 30

**Capture Software:**

* EQMod mount control. Captured using [N.I.N.A.](https://bitbucket.org/Isbeorn/nina/overview) and PHD2 for guiding and dithering.

**[PixInsight Processing](https://i.imgur.com/5m6vSdw.png):**

* BatchPreProcessing

* SubrameSelector

* StarAlignment

* LocalNormalization (H-alpha Only)

* ImageIntegration

* DrizzleIntegration

* DynamicCrop

* DynamicBackground Extraction

* **Ha data:**

* TVG/MMT noise Reduction

* HistogramTransformation

* **RGB Data:**

* LinearFit to green

* ChannelCombination

* AutomaticBackgroundExtraction

* PhotometricColorCalibration

* SCNR

* HSV Repair

* ArcsinhStretch

* HistogramTransformation

* LRGBCombination with Ha as Luminance

* ACDNR

* [Curve](https://i.imgur.com/Vs6GSGn.jpg)Transformations

* Automatic Star Mask

* MorphologicalTransformation to shrink stars

* DarkStructureEnhance

* FastRotation (rotate 90 degrees for the 'skull look')

* Annotation

/r/astrophotography
Narrowband imaging
Suburban Astrophotography
ZWO ASI1600MM/QHY163M

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	3141234
PixInsight job	SEBCVIVSYDQ09NY6OVQSNM5P2GTALPXL
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h32m32s.383
RA (top/left)	06h35m31s.234
RA (top/right)	06h30m40s.779
RA (bottom/right)	06h29m33s.787
RA (bottom/left)	06h34m23s.761

Dec (center)	+04°56′31″.60
Dec (top/left)	+05°37′46″.95
Dec (top/right)	+05°50′31″.35
Dec (bottom/right)	+04°15′09″.96
Dec (bottom/left)	+04°02′26″.20

Image Index:

Contribution Index (beta):