NGC 7635 - The Bubble Nebula (Kevin Covey)

NGC 7635 - The Bubble Nebula

The Bubble Nebula is one of my all time favorites. I first got hooked on astrophotography after seeing a picture of it taken by Rob Gendler. I have short focal length pictures taken with my Takahashi FSQ 106ED, but this is the first long focal length image I have taken,

I captured the data in 2021 over 13 nights from August 7th to September 7th. I tried processing it in various ways from all RGB to all Narrowband and combinations in between. My goal was to have the bubble stand out as much as I could from the background nebula clouds. I experimented with many techniques from Adam Block tutorials including narrowband normalization, NBColorMapper, and continuum subtraction. In the end, I went "old school" and used Photoshop to screen blend the starless Narrowband data and the RGB data. The stars are from the RGB data. I especially like the detail I was able to get in the bubble itself. I used drizzle integration to try to improve the detail since the image would be digitally zoomed in and cropped.

From the Nasa.gov website: "An enormous bubble is being blown into space by a super-hot, massive star. The Bubble Nebula is roughly seven light-years across and is located 7,100 light-years away in the constellation Cassiopeia."

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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	Basic failed
Started	...
Astrometry.net job	9422482
PixInsight job	n/a
PixInsight queue size	n/a
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