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Contains:  NGC 7479
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The Propeller Galaxy (NGC 7479)

Technical card

Resolution: 2460x2195

Dates:Sept. 9, 2018Sept. 10, 2018Sept. 11, 2018

Frames:
Astrodon 50 mm G: 8x900" -20C bin 1x1
Astrodon 50mm B: 8x900" -20C bin 1x1
Astrodon 50mm L: 12x900" -20C bin 1x1
Astrodon 50mm R: 8x900" -20C bin 1x1

Integration: 9.0 hours

Darks: ~20

Flats: ~80

Flat darks: ~80

Bias: ~20

Avg. Moon age: 10.69 days

Avg. Moon phase: 1.73%

Mean SQM: 21.50

Mean FWHM: 2.00

Astrometry.net job: 2258433

RA center: 346.242 degrees

DEC center: 12.315 degrees

Pixel scale: 0.469 arcsec/pixel

Orientation: 89.276 degrees

Field radius: 0.215 degrees

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

3rd of 3 September objects.

The Propeller Galaxy (NGC 7479) is a barred spiral galaxy located about 105 million light-years away from Earth in the northern constellation of Pegasus, while it is racing away from us at some 2381 kilometers per second.

It has a very asymmetric spiral structure with a bright, long bar. Its tightly wound arms create an inverted ‘S’, as they spin in an anticlockwise direction. However, at radio wavelengths, it spins the other way, with a jet of radiation that bends in the opposite direction to the stars and dust in the arms of the galaxy.

This radio jet in the Propeller Galaxy was probably put into its bizarre backwards spin by a recent minor merger with another galaxy.

Star formation is reignited by galactic collisions, and indeed NGC 7479 is undergoing starburst activity, with many bright, young stars visible in the spiral arms and disk. The brightest stars in this image, however, are foreground stars.

NGC 7479 is also classified as a Seyfert galaxy, a galaxy with an extremely bright, active galactic nucleus (AGN), that contains a supermassive black hole.

Two supernovae occurred in the Propeller Galaxy: SN 1990U that reached mag 16, was discovered on July 27, 1990, and SN 2009jf with a maximum brightness of mag 15, was discovered on September 27,2009 by the Lick Observatory Supernova Search.

Comments

Author

KuriousGeorge
KuriousGeorge
License: None (All rights reserved)
3774
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The Propeller Galaxy (NGC 7479), 





    
        

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