NGC 7635 Bubble Nebula #5 - HOO (Molly Wakeling)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble nebula · NGC 7635 · Sh2-162

Powered byPixInsight

NGC 7635 Bubble Nebula #5 - HOO

This image was taken in three different wavelengths that are emitted by three different energy transitions of elements in space: hydrogen alpha (Ha, or HII), oxygen-III (OIII), and sulfur-II (SII).

This image is a popular combination known as HOO. It's a natural-ish color combination, where Ha is red and OIII is both green and blue. It's natural-ish because Ha light is really in the deep red, and OIII is a blue-green color. SII is very close in wavelength to Ha, so you don't really miss it in this kind of color combo (especially for an object like this one that doesn't have a whole lot of SII to begin with).

The Bubble Nebula is a beautiful and fascinating object. It lies within a region of hydrogen gas up in the constellation Cassiopeia. The bubble itself is shaped by the stellar wind (ejected charged particles) from a hot, young, massive star in the center, which is thought to be 44 times more massive than our own Sun. The bubble is 10 lightyears across, which is relatively small as far as nebulae go, and lies about 11,000 lightyears away from us.
The rings around the bright star to the lower right of the bubble are an optical effect of the imaging system because of the star's brightness. They were a lot more prominent in the SII and OIII channels, but largely I think because the nebula signal at those wavelengths was much weaker.

Data from Brian Sheets.

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	Advanced success
Started	...
Astrometry.net job	3074892
PixInsight job	QQJ3E4YFWFEA74DLIM1BVW2PO0XMC8SI
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	23h20m23s.59
RA (top/left)	23h21m25s.12
RA (top/right)	23h19m20s.56
RA (bottom/right)	23h19m22s.72
RA (bottom/left)	23h21m26s.12

Dec (center)	+61°11′16″.4
Dec (top/left)	+61°20′40″.7
Dec (top/right)	+61°20′31″.7
Dec (bottom/right)	+61°01′51″.7
Dec (bottom/left)	+61°02′00″.9

Image Index:

Contribution Index (beta):

NGC 7635 Bubble Nebula #5 - HOO

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

NGC 7635 Bubble Nebula #5 - HOO

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information