The Rosette Nebula / Caldwell 49 (Terry Robison)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: NGC 2237 · NGC 2238 · NGC 2239 · NGC 2246 · Rosette A · Rosette B · Rosette Nebula · The star 12Mon

The Rosette Nebula / Caldwell 49, Terry Robison

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The Rosette Nebula / Caldwell 49

Link: https://www.flickr.com/photos/97807083@N00/49755547432/in/dateposted/

Powered byPixInsight

The Rosette Nebula / Caldwell 49

Link: https://www.flickr.com/photos/97807083@N00/49755547432/in/dateposted/

The Rosette Nebula is a large spherical molecular cloud in the Monoceros (the Unicorn) region of the Milky Way. It measures about 130 light-years in diameter and is around 5,000 light-years away. It was created only a few million years ago when a giant molecular cloud collapsed. At its centre, a young open cluster is present, NGC 2244. This star cluster contains several blue-white O-type stars which are some of the hottest and brightest stars in our universe.

As you move outwards away from the centre, darker splotches known as Bok Globulares are present. They are dense clouds of gas and dust, and from our vantage point, they appear as black holes in the cosmos. I think they look very cool.

To create this image, I combined the light from seven different filters. These include both broadband and narrowband filtered light using a monochrome camera. My intent was to retain a natural look even though I had a great deal of narrowband data incorporated in the final result. Stong emission data from narrowband data can overwhelm the traditional colour components in the final result.

Equipment Details:

• 10 Inch RCOS fl 9.1

• Astro Physics AP-900 Mount

• SBIG STL 11000m

• FLI Filter Wheel

• Astrodon LRGB Filters

• Baader Planetarium H-alpha 7nm Narrowband-Filter

• Baader Planetarium OIII 8.5nm Narrowband-Filter

• Baader Planetarium SII 8.0nm Narrowband-Filter

Exposure Details:

• Lum 77 X 900 Bin 1

• Red 24 X 450 Bin 2

• Green 23 X 450 Bin 2

• Blue 48 X 450 Bin 2

• Ha 36 X 900 Bin 1

• SII 27 X 900 Bin 1

• OIII 16 X 900 Bin 1

Total Time: 50.975 Hours

Astronomical Society of Victoria (ASV)

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Distribution of astrophotographers

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	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
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Star trails
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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	3398270
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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The Rosette Nebula / Caldwell 49

The Rosette Nebula / Caldwell 49

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The Rosette Nebula / Caldwell 49

The Rosette Nebula / Caldwell 49

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