NGC7635: The Bubble Nebula (KTAZ)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · HD220057 · HD220074 · HD220167 · HD220180 · HD220770 · HD240248 · HD240253 · HD240256 · HD240264 · LBN 543 · LBN 544 · LBN 547 · LBN 548 · LBN 549 · LDN 1231 · M 52 · NGC 7635 · NGC 7654 · PK112-00.1 · Sh2-162

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NGC7635: The Bubble Nebula

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NGC7635: The Bubble Nebula

Blown by the wind from a massive star, this interstellar apparition has a surprisingly familiar shape. These fierce winds are sculpting the surrounding material - composed of gas and dust - into the curved shape that astronomers have dubbed the Bubble Nebula (NGC 7635). Although it looks delicate, the 7 light-year diameter bubble offers evidence of violent processes at work. Below and left of the Bubble's center is a hot, O-type star, several hundred thousand times more luminous and some 45 times more massive than our Sun. A fierce stellar wind and intense radiation from that star has blasted out the structure of glowing gas against denser material in a surrounding molecular cloud. The intriguing Bubble Nebula and associated cloud complex lie a mere 7,100 light-years away toward the boastful constellation Cassiopeia in our own Milky Way.

Captured over 4 nights, this is my fist attempt at Narrow Band Imaging using only Ha and Oiii data from an Antlia Alp-T 5nm filter on a OSC camera. The Sii signal was a composite built from luminance. So, I consider it a Modified Hubble Palette. The stars were extracted from a broadband image to retain star color.

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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

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	6324528
PixInsight job	5TTIIZUUQG5K3PSGAJZMI7DY7NVYDB3P
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h20m42s.66
RA (top/left)	23h23m31s.50
RA (top/right)	23h27m03s.38
RA (bottom/right)	23h17m43s.21
RA (bottom/left)	23h14m38s.59

Dec (center)	+61°10′47″.5
Dec (top/left)	+60°13′01″.7
Dec (top/right)	+61°52′12″.2
Dec (bottom/right)	+62°08′25″.8
Dec (bottom/left)	+60°28′21″.9

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NGC7635: The Bubble Nebula

NGC7635: The Bubble Nebula

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NGC7635: The Bubble Nebula

NGC7635: The Bubble Nebula

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