Bubble Nebula (Peter Kennett)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · HD220057 · LBN 548 · LBN 549 · NGC 7635 · Sh2-162

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Bubble Nebula

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Bubble Nebula

Here's NGC 7635, the Bubble Nebula, located about 7,100 light-years away in the constellation Cassiopeia. Its originator star burns a million times brighter than the Sun and produces powerful gas outflows called stellar winds that howl at more than four million miles per hour. Over time, the winds have pushed nearby gas and dust outward, forming a layer around the star that is denser in some areas than others. Based on the rate that the star is expending energy, scientists estimate within 20 million years it will explode as a massive supernova, visible as a bright beacon in the daytime sky here. And with that, the bubble will succumb to a common fate: It’ll pop. The Bubble is 10 light-years across, more than twice the distance from Earth to Alpha Centauri, our nearest star.

**Exposures:**

*Nebula:*

- H-Alpha 176 x 3 minutes

- Oxygen III - 184 x 3 minutes

- Sulfur II - 135 x 3 minutes

*Stars:*

- Red 32 x 2 minutes

- Blue: 33 x 2 minutes

- Green - 33 x 2 minutes

**Equipment:**

- Scope: Celestron C11 EdgeHD f/7 (1960mm focal length)

- Camera: ASI 1600MM Pro -15C

- Mount: iOptron CEM120 EC2

- Focuser/Rotator: Moonlite Litecrawler

- Filters: ZWO EFW with 36mm Baader Filters

**Software:**

Control: KStars 3.6.5 MacOSX

Post: PixInsight & Photoshop

New Mexico Imagers

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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
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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
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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	8091787
PixInsight job	TH1GHR6A4Y3IHFK5Q8VG6SZ10KME9LBN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h20m42s.427
RA (top/left)	23h18m41s.210
RA (top/right)	23h22m44s.350
RA (bottom/right)	23h22m45s.302
RA (bottom/left)	23h18m39s.554

Dec (center)	+61°12′20″.38
Dec (top/left)	+61°01′06″.47
Dec (top/right)	+61°01′07″.32
Dec (bottom/right)	+61°23′27″.53
Dec (bottom/left)	+61°23′25″.81

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