Sunday, December 17, 2017

received NGC 4559 images (Halifax)

BGO imaged NGC 4559 also known as Caldwell 36. This is a large canted galaxy in the constellation Coma Berenices. It is one of the RASC Finest NGCs. One I had never seen before.

large spiral RASC Finest NGC 4559 in luminance

Luminance only, 60 seconds subexposures, 10 stacked shots. FITS Liberator, GIMP. North is up; east is left.

It is not uniform or symmetrical. It seems it has been tidally disturbed. The outer spiral arms to the west are extended or stretched. This is curious to me as I do not see any other big galaxies near by.

My SkyTools software shows objects within the galaxy. The large diffuse nebula IC 3555 is north of the core. IC 3552 is north-west of 3555. It is much smaller. IC 3551 is north-west of the nucleus and nearly due west of the bright foreground star TYC 01992-1757 1. To the south-east of the core is IC 3563. It is south-east of GSC 01992-2058. Always amazing, seeing nebulae inside distant galaxies.

To the north-east of the galaxy is a tiny fuzzy, LEDA 93665.

North of 93665 is a small lint ball, LEDA 1825270.

There's an annoying gradient in this image. There are some strange bands too, running horizontally.


Imaged again, with a better outcome, on 1 Feb 2020.


Wikipedia link: NGC 4559.

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