Object: M 83

The Southern Pinwheel is a magnificent face-on barred spiral galaxy in the constellation Hydra. It lies about 15 million light years from Earth and forms a small group with its equally famous partner, Centaurus A or NGC 5128. This object was discovered by Nicholas Louise de Lacaille at the Cape of Good Hope, Africa on February 23, 1752. Charles Messier observed and cataloged it nearly 30 years later from his Paris Observatory, an outstanding feat considering his northerly location and relatively primitive equipment.

In his classic book Galaxies, the American astronomer Harlow Shapley wrote that M 83’s dynamic appearance was “spectacular evidence that the universe is not static.”

  • Team: Dave Jurasevich and Howard Hedlund
  • Filters: Tru-Balance LRGB filter set - Gen 2
  • Exposure: L 50 x 600 sec 1x1 bin; RGB 18 x 600 sec, 1x1 bin
  • Date: February, March and April 2015
  • Software: CCDStack 2, Photoshop CS5