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Contains:  IC 342
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The Hidden Galaxy (IC 342)

Technical card

Resolution: 3924x4008

Dates:Nov. 6, 2018Nov. 7, 2018Nov. 8, 2018

Frames:
Astrodon 50 mm G: 8x900" -20C bin 1x1
Astrodon 50mm B: 8x900" -20C bin 1x1
Astrodon 50mm L: 27x900" -20C bin 1x1
Astrodon 50mm R: 8x900" -20C bin 1x1

Integration: 12.8 hours

Darks: ~20

Flats: ~80

Flat darks: ~80

Bias: ~20

Avg. Moon age: 19.51 days

Avg. Moon phase: 0.81%

Mean SQM: 21.40

Astrometry.net job: 2358288

RA center: 56.717 degrees

DEC center: 68.097 degrees

Pixel scale: 0.468 arcsec/pixel

Orientation: 179.420 degrees

Field radius: 0.365 degrees

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

IC 342 is a challenging target. Although it's bright, the galaxy sits near the equator of the Milky Way's galactic disk, where the sky is thick with glowing cosmic gas, bright stars, and dark, obscuring dust.

In order to see the intricate spiral structure of IC 342, you must gaze through a large amount of material contained within our own galaxy—no easy feat! As a result IC 342 is relatively difficult to spot and image, giving rise to its intriguing nickname: the "Hidden Galaxy."

Located very close to the Milky Way at 10.7 million light years distant from Earth, this sweeping spiral galaxy would be among the brightest in the sky were it not for its dust-obscured location. The galaxy is very active, as indicated by the range of colors.

A beautiful mixture of hot, blue star-forming regions, redder, cooler regions of gas, and dark lanes of opaque dust can be seen, all swirling together around a bright core. In 2003, astronomers confirmed this core to be a specific type of central region known as an HII nucleus—a name that indicates the presence of ionized hydrogen—that is likely to be creating many hot new stars.

Comments

Author

KuriousGeorge
KuriousGeorge
License: None (All rights reserved)
3417
Like

Revisions

B

Removed slight green tint.

C

In PI > PhotometricColorCalibration, changed White Reference from Average Spiral Galaxy to Elliptical Galaxy. This seems to "soften" the colors a bit with less red emphasis.

Sky plot

Sky plot

Histogram

The Hidden Galaxy (IC 342), 





    
        

            KuriousGeorge