NGC 3121 (Bubble Galaxy) (Alex Woronow)

Celestial hemisphere: Southern · Constellation: Leo (Leo) · Contains: NGC 3521

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NGC 3121 (Bubble Galaxy)

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NGC 3121 (Bubble Galaxy)

NGC 3521 (The Bubble Galaxy)

OTA: TAO 150 175 (f/7.3)

Camera: FLI - ML16200

Observatory: Deep Sky West, Chile

EXPOSURES:

Red: 9 x 600 sec.

Blue: 14 x 600

Green: 25 x 600

Lum.: 60 x 600

Total exposure ~17 hours

Image Width: ~2/3 deg

Processed by Alex Woronow (2019) using PixInsight, Topaz, Aurora HDR

(Source: largely Wikipedia)

NGC 3521 has be classified as a “flocculent” spiral galaxy, referring to the patchiness of its spiral arms. Apparently, this feature arises because the stellar winds from some recently formed giant stars produce shock waves that compress the surrounding gasses and initiate the gasses’ condensation into additional stars. This has been called, “Infection propagation.”

NGC 3521 lies about 26.2M light-years from us and is at about 11 magnitude and about 11 arc minutes across (excluding the extended cloud), making it accessible to observers with modest telescopes.000

Somewhat arduous processing procedures (and 60 frames of luminosity!!), have revealed a surrounding halo of stars and dust in this rendition--there even some structure visible.. Thanks DSW!

Also, notice the very small spiral galaxy at about 4:00 from the galaxy’s center, just outside the cloud. This is PGC 135772. Many other small fuzzy galaxies can be spotted in this image.

Note: this image is from a test sequence on the image rig executed from New Mexico. The rig is now in N. Chile and taking images of southern-sky objects. Cannot wait until it completes its first images.

The refractors!

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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	2798088
PixInsight job	NX4U9Y0DWYR2BCHFBQZOVYJ3EAJT0HWC
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h05m55s.41
RA (top/left)	11h07m06s.20
RA (top/right)	11h07m28s.94
RA (bottom/right)	11h04m44s.62
RA (bottom/left)	11h04m21s.76

Dec (center)	-00°02′17″.7
Dec (top/left)	+00°21′06″.8
Dec (top/right)	-00°19′59″.1
Dec (bottom/right)	-00°25′42″.2
Dec (bottom/left)	+00°15′23″.8

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NGC 3121 (Bubble Galaxy)

NGC 3121 (Bubble Galaxy)

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NGC 3121 (Bubble Galaxy)

NGC 3121 (Bubble Galaxy)

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