THE COCOON GALAXY (NGC4490) (Drew Evans)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: NGC 4485 · NGC 4490

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THE COCOON GALAXY (NGC4490)

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THE COCOON GALAXY (NGC4490)

THE COCOON GALAXY (NGC4490)

Arguably the toughest galaxy I have imaged yet, the Cocoon Galaxy lies some 30 million light-years away in the constellation of Canes Venatici.

This galaxy forms an interacting pair with the smaller irregular galaxy NGC 4485. This system is similar that of the Magellanic Clouds and is surrounded by an enormous hydrogen cloud.

The extreme tidal forces of their interaction have determined the shapes and properties of the two galaxies.

Once a barred spiral galaxy, similar to the Milky Way, the Cocoon Galaxy’s outlying regions have been stretched out, resulting in its nickname of the Cocoon Galaxy. Virtually no trace of its past spiral structure can be seen from our perspective.

OTA: William Optics FLT 132 Triplet Refractor with Flat7A 0.8x Reducer/Flattener
Mount: Celestron CGX-L
Camera: ZWO ASI2400MC Pro
Gain: 158
Cooling Temperature: -10 degrees celsius

Filter: Optolong LPro Filter

Night 1 = 41 x 300s
Night 2 = 40 x 300s
Night 3 = 40 x 300s
Total = 140x x 300s = 11.6 hours

Auto-guiding: ZWO ASI174MM Mini and ZWO M48 OAG-L
Control: ZWO ASIAIR Pro
Calibrated in Astro Pixel Processor with darks and flats
Processed in Pixinsight and Lightroom.
Star refraction spikes added using 1mm clear string in front of objective lens.

Location: Bortle Class 4 skies near downtown Flagstaff, Arizona
#astrophotography #astronomy #space #galaxy

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	Distinct awarded users	Total awarded images
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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	5792266
PixInsight job	F2Y9PBXRU10Y5TNE307SB61B5TKFJU7W
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h30m24s.93
RA (top/left)	12h32m45s.73
RA (top/right)	12h31m09s.86
RA (bottom/right)	12h28m02s.80
RA (bottom/left)	12h29m40s.82

Dec (center)	+41°38′12″.6
Dec (top/left)	+41°17′52″.1
Dec (top/right)	+42°10′26″.2
Dec (bottom/right)	+41°58′21″.5
Dec (bottom/left)	+41°05′57″.7

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THE COCOON GALAXY (NGC4490)

THE COCOON GALAXY (NGC4490)

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THE COCOON GALAXY (NGC4490)

THE COCOON GALAXY (NGC4490)

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