NGC 3199: A View in LRGB Completed by Ha, O3 and S2 Narrow Band Data (Fernando)

NGC 3199: A View in LRGB Completed by Ha, O3 and S2 Narrow Band Data

Distant from Earth 11 736 light years in the southern constellation of Carina, NGC 3199 is classed as a diffuse nebula, embedded with a highly assymetric Wolf-Rayet star close to the center of the ring. The nebula is about 75 light-years across.

A Wolf-Rayet star is hot, short-lived and generates an intense stellar wind. The one in NGC 3199, as mentioned, has a highly asymmetric morphology, with a very bright hemisphere near the exciting star HD 89358 and a much fainter and more extended other hemisphere.

This nebula is modeled in terms of the distorted bubble produced by a moving star blowing a strong stellar wind into a surrounding uniform interstellar medium.

This description is an outine of the article found in:

http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1989A%26A...226..270D&defaultprint=YES&filetype=.pdf

The image is a LRGB standard enhanced by narrow band data from captures of 12 subframes of 20 minutes for each channel (Ha, O3 e S2).

The subs of LRGB followed the sequence showed below:

Lum: 10x900sec bin1x1

RGB: 10x600sec bin2x2

Set-up:

Scope: Esprit 120 f/7

Mount: CGE-Pro

Camera: ST8300M

OAG and Filter Wheel: SBIG 8300

Guider CCD: Lodestar

Darks, bias and Flats applied

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	n/a
Started	n/a
Astrometry.net job	n/a
PixInsight job	n/a
PixInsight queue size	n/a
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