A nice edge-on barred spiral galaxy in the constellation of Sculptor, somewhat smaller than our own Milky Way.
NGC 55 is generally regarded as a member of the Sculptor Group of galaxies, located near the South Galactic Pole (but some have listed it as a member of the Local Group).
Its apparent full length (perhaps not all caught in my image) is approximately 1 LD (Lunar Diameter).
Image obtained during a Macarthur Astronomical Society field night.
NGC 55, Caldwell 72, PGC 1014.
Visual magnitude: +7.8.
Apparent diameter: 30.2 x 3.1 arc-min.
Actual diameter: 60,000 light years.
Distance: 6.9 million light years.
Exposure: 19 x 4 min, ISO 800.
Location: The Oaks, NSW.
Sky: semi-dark rural sky, clear.
Processing: Canon DPP, Deep Sky Stacker and GIMP.
Imaging telescope: Skywatcher Esprit 120ED Super APO triplet refractor.
Focal length: 840 mm, focal ratio: f/7.
Imaging camera: Canon EOS 60D.
Guiding telescope: Orion ShortTube 80mm Achromatic doublet refractor.
Focal length: 400 mm, focal ratio: f/5.
Guiding camera: Orion StarShoot camera.
Guiding control software: PHD2.
Telescope mount: SkyWatcher EQ6-R.
Polar aligning: QHYCCD PoleMaster.
Flattener: yes; filter: no.
Image © R.Powell
Such a wonderful view of NGC 55 galaxy!
Thinking about galaxies, each one is a unique mixture of movement, dynamic and lots of energy.
Dark matter in spiral galaxies keep them from flying away, isn’t it, Roger?…
Enjoy tonight, MAS Public Observing Night, (Saturday 30th September).
That is the best current theory, Kazia – but no-one knows for certain what dark matter is – yet.