Sextans A (DDO 75)

Telescope: Blanco 4 meter (157 inch) reflector, 21311 mm FL
Camera: Mosaic II, 8675 x 8775 pixels
Exposure: Image is 10.3 x 9.3 arcmin and combines 4 frames B (60 sec), V (60 sec), R (50 sec) and HA (300 sec). Data from A Survey of the Resolved Stellar Content of Nearby Galaxies Currently Forming Stars. Discovered in 1942. Cepheid variables were discovered in 1982. Processed with PixInsight and Photoshop.
Location: Cerro Tololo Inter-American Observatory, Chile (Elevation 7241')
Image Center (J2000): RA 10h 11m 01s, Dec -4° 41' 37"
Image Size: 10' x 9'

Dwarf irregular galaxy with low surface brightness and a peculiar square shape, mag 11.9, part of the Local Group. Easily resolved into stars. Much of the galaxy consists of young blue stars highlighting areas of current star formation. HII regions are seen around the edges. The bright star on the face of the galaxy is in the foreground and unassociated with Sextans A. Discovered in 1942. Cepheid variables discovered in 1982.


Sextans A (DDO 75), Dwarf irregular galaxy with low surface brightness and a peculiar square shape, mag 11.9, part of the Local Group. Easily resolved into stars. Much of the galaxy consists of young blue stars highlighting areas of current star formation. HII regions are seen around the edges. The bright star on the face of the galaxy is in the foreground and unassociated with Sextans A. Discovered in 1942. Cepheid variables discovered in 1982.