Sh2-308 The Dolphin Head Nebula (jmdl101)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa) · Contains: 16 CMa) · The star Udra (ο1 CMa

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Sh2-308 The Dolphin Head Nebula

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Sh2-308 The Dolphin Head Nebula

The Dolphin Head only reaches 35° here, and this month is the longest it stays visible for me from my back yard. Combined and hour of RBG stars with almost 3 hours with a dual narrowband RGB image. The HOO image looked about the same, but the reds were orange with the synthetic green channel, so stuck with straight RGB instead.

Equipment:
Eq6-r pro
8" Bresser Imaging Newtonian
Nexus 0.75x reducer coma corrector
Asi2600mc pro
Askar OAG with asi174mm mini
Askar filter drawer
Askar 6nm D1 colormagic filter

Acquisition:
35x300s with the D1
30x120s filterless
Gain 100, offset 18, - 10c
Darks, flats, and flat darks

Processing:
WBPP, all together
Linear fit the D1 red and green channels to blue
Each image:
ABE and DBE
BlurX
Image solver
SPCC
SCNR green
NoiseX
EZ soft stretch
StarX D1 filter image

D1 image:
Curves transformation to adjust hues and background
RGB image:
Curves transformation for saturation on stars and background level, then starX with unscreened stars

Combined the RGB stars image and D1 starless image with pixelmath, combine(stars, starless, op_sxreen())

Saved as 16 bit tif, imported into mobile lightroom for color noise reduction, light adjustments, and a tad of sharpening, and finally cropped for framing and saved as jpg.

Original
Final
B

B

Description: Updated processing with newer pixinsight tools.

Uploaded: ...

FriendlyCosmos

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	Image of the day	Top pick	Top pick nominations	Total submitted
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Traveller
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Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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.
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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	Basic success
Started	...
Astrometry.net job	9140764
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Sh2-308 The Dolphin Head Nebula

Sh2-308 The Dolphin Head Nebula

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Sh2-308 The Dolphin Head Nebula

Sh2-308 The Dolphin Head Nebula

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Acquisition details

Description

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In these public groups

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