NGC 2359: The Thor's Helmet **REV-2** (Fernando)

NGC 2359: The Thor's Helmet REV-2

This is an ionized HII region sorrounding the star HIP 35378, a WN Wolf-Rayet star, located closed to the bubble on the "fore-head" of the helmet, shinning with magnitude 11.0.

The visible nebula is part of a large neutral gas cloud, the HII region is due to the ionizing radiation from the Wolf-Rayet star. By the way, the stellar wind of this star has blown out the mentioned bubble in the HII region.

The distance of the nebula to Earth is around 16 thousands light years and its apparent size is 10 x 5 arc minutes.

Image taken during Full Moon using narrowband filtering centered in Ha and O3, unbinned, 18 frames of 17 minutes for each channel. The green channel has been synthesized.

Instruments:

Scope: ES 127mm f/7.5

Focal Reducer/Flatenner: Universal Hutech x0,7

OAG and Filter-wheel: SBIG

CCD: ST8300M

Pre-processing and pos-processing: PixInsight

Bias, Darks and Flats applied

**REV-2**

The deconvolution on the luminance channel has been improved. In addition, a better denoise routine has been carried out using the new PI resources.

Final
Original
B

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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
Artificial satellite

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	n/a
Started	n/a
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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