Witch Head Nebula (Alex)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: IC 2118 · NGC 1752 · Witch Head nebula

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Witch Head Nebula

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Witch Head Nebula

I wasn't sure how well this would come out as it's fairly faint compared to the targets I've tried before.

As it's faint and there's no really bright stars in the field of view, I went for 10 minute exposures, which seem to have worked fairly well.

Unfortunately there seems to be a lot of satellites in that part of the sky and a number of the subs had trails.

It didn't seem to matter what settings I used in DSS, I couldn't get rid of all of the trails, so I had to resort to cleaning the last one off using Photoshop.

Equipment:

iOptron CEM25P mount

Skywatcher ED80 DS Pro (510mm Focal Length with 0.85x Reducer/Flattener)

Sony a6300 camera

ZWO ASI 120MM-S Guide Camera

SkyWatcher 9x50 Finder as guide scope

Nanopi M4 running Armbian with KStars and EKOS/INDI for capture and guiding

Acquisition:

Night of the 2nd February 2019

Temperature 3 degrees

11x 600 second dithered lights @ ISO 400 (110 total mins)

10 darks

35 flats

300 bias

Pre-Processing:

dcraw conversion script to ensure no white balancing

Stacked in DSS

Main Image Processing in Star Tools:

Bin 50%

Crop

Wipe

Develop

Deconvolution

Contrast

HDR

Filter

Colour

Life

Wavelet De-Noise

Magic - Star reduction

Photoshop spot healing brush tool to remove a satellite trail

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	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

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	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

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.
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	Basic success
Started	...
Astrometry.net job	2555352
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Witch Head Nebula

Witch Head Nebula

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Image Index:

Contribution Index (beta):

Witch Head Nebula

Witch Head Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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