NGC 7552
Barred-Spiral Galaxy, Grus
NGC 7552 (also known as IC 5294) is a barred spiral galaxy in the constellation Grus. It is at a distance of roughly 60 million light years from Earth, which, given its apparent dimensions, means that NGC 7552 is about 75,000 light years across. It forms with three other spiral galaxies the Grus Quartet.
NGC 7552 was originally discovered and reported in 1826 by James Dunlop and John Herschel added it in the General Catalogue of Nebulae and Clusters as number 3977. However, Lewis Swift reported the galaxy independently in on October 22, 1897, at right ascension 9 arcseconds off the location of the galaxy and was included in Index Catalogue as IC 5294.
NGC 7552 is a barred spiral galaxy, with two spiral arms forming an outer pseudo-ring. The galaxy is seen nearly face on, at an inclination of ~ 28°. The one arm is more prominent and the less prominent arm shows no clear continuation with the bar. The bar is dusty, and four huge HII regions are detected in it. The disk features numerous scattered HII regions in an asymmetric pattern. The total infrared luminosity of the galaxy is 1011.03 L☉, and thus is categorized as a luminous infrared galaxy.
NGC 7552 was originally discovered and reported in 1826 by James Dunlop and John Herschel added it in the General Catalogue of Nebulae and Clusters as number 3977. However, Lewis Swift reported the galaxy independently in on October 22, 1897, at right ascension 9 arcseconds off the location of the galaxy and was included in Index Catalogue as IC 5294.
NGC 7552 is a barred spiral galaxy, with two spiral arms forming an outer pseudo-ring. The galaxy is seen nearly face on, at an inclination of ~ 28°. The one arm is more prominent and the less prominent arm shows no clear continuation with the bar. The bar is dusty, and four huge HII regions are detected in it. The disk features numerous scattered HII regions in an asymmetric pattern. The total infrared luminosity of the galaxy is 1011.03 L☉, and thus is categorized as a luminous infrared galaxy.
Telescope: Planewave CDK17 (FR) f4.5
Mount: Astro Physics 1600GTO
Camera: QHY16200A/ Integral FW
Guider: Agena Starguide II / ZWO ASI178MM
Filters: Astronomik 36mm LRGB
L: 87×10 mins = 870 mins, R: 24×10 mins = 240 mins, G: 24×10 mins = 240 mins, B: 24×10 mins = 240 mins
Total Imaging Time: 26h 30m
Data Imaged remotely on 9 nights during August 2024.
Imaged from Observatorio El Sauce, Chile, in partnership with Fred Espenak.
Data acquisition & Processing by David Churchill.
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