RCW113 (Gum 55) (Mathieu Guinot)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: IC 4628 · NGC 6192 · NGC 6231 · NGC 6242 · The star ζ1 Sco · The star ζ2 Sco

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RCW113 (Gum 55)

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RCW113 (Gum 55)

Rodgers, Campbell & Whiteoak (RCW) catalog of H-alpha emission nebulae in the Southern Milky Way.
RCW 113, also known as Gum 55 is a large diffuse nebulae region associated with NGC 6231 open cluster.

The two bright stars to the left of NGC 6231 are zeta1 and zeta2 Scorpii.
The Prawn Nebula (upper right, with blue hues), also known as IC 4628, is an emission nebula around 6,000 light-years from Earth.
To the right of IC 4628 there is another open cluster NGC 6242.
The Wolf or Fenrir Nebula (SL-17), at 10 o’clock position in this image, is a dark nebula of dust and gas hiding the background stars.
The Dark Tower (SFO 82) is the prominent bright-rimmed cometary globule, about 1.5 degrees away from NGC 6231 and Zeta Scorpii. The shape of this massive structure of cosmic dust resembles a dark tower emerging from the star field background.

Most of these objects lie about 6000 light-years away in Scorpius, near the Sco OB1 association of stars.

Telescope Live datas taken from Heaven's Mirror Observatory (Australia), from 20 june to 19 september 2022.

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
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.

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