NGC 253 (Silver Dollar Galaxy)

The Silver Dollar Galaxy (also known as the Silver Coin or Sculptor Galaxy, NGC 253, or Caldwell 65) is a spiral galaxy in the constellation Sculptor. It is currently undergoing a period of intense star formation. The galaxy was discovered by Caroline Herschel in 1783.It is described by Allan Sandage in 1961 as "the prototype example of a special subgroup of Sc systems". The Sculptor Galaxy is located at the center of the Sculptor Group, one of the nearest groups of galaxies to the Milky Way.The estimated distance of NGC 253 is about 11.4 Mly (3.5 Mpc).



Object Details:

Object: NGC 253 (Caldwell 65)
Constellation: Sculptor
Center of field: R.A. 00h, 47m, 33s. ; DE. -25°, 17', 18"
Field dimensions: Apr. 30 x 40 '


Technical Details:

Optics: 12" ASA Astrograph at F/6.8
Mount: ASA DDM 85
Camera: SBIG STL-11000M
Filters: Astronomik LRGB filters
Dates/Times: 27 October 2011
Location: Rozhen
Exposure Details: L = 40 min, R = 30 min., G = 30 min.,B = 30 min.;
Subexposures: 10 minutes
Acquisition: CCD Soft
Processing: PixInsight, Photoshop CS

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