NGC 6822 (Barnard's Galaxy, Caldwell 57, DDO 209)

Telescope: Blanco 4 meter (157 inch) reflector, 21311 mm FL
Camera: Mosaic II, 8675 x 8775 pixels
Exposure: Image is 19.6 x 16.8 arcmin and combines 4 frames B (120 sec), V (120 sec), R (100 sec) and HA (300 sec). Data from A Survey of the Resolved Stellar Content of Nearby Galaxies Currently Forming Stars. Processed with PixInsight and Photoshop.
Location: Cerro Tololo Inter-American Observatory, Chile (Elevation 7241')
Image Center (J2000): RA 19h 44m 55s, Dec -14° 48' 51"
Image Size: 19 x 16'

Barred irregular galaxy in the Local Group, mag 9.0, with a central bar embedded in an oval halo of lower surface brightness. One of the closer galaxies to the Milky Way and one of the easiest galaxies to resolve into stars with 300+ stars brighter than 18th mag. Seen through a rich field of stars. Contains many young blue stars and red hydrogen star forming regions. Recognized as an external stellar system in 1922. Hubble discovered 11 Cepheid variable stars in NGC 6822 in 1925 which made it the first galaxy beyond the Magellanic Clouds to have its distance accurately determined. Above right is the round Bubble nebula in NGC 6822.


NGC 6822 (Barnard's Galaxy, Caldwell 57, DDO 209), Barred irregular galaxy in the Local Group, mag 9.0, with a central bar embedded in an oval halo of lower surface brightness. One of the closer galaxies to the Milky Way and one of the easiest galaxies to resolve into stars with 300+ stars brighter than 18th mag. Seen through a rich field of stars. Contains many young blue stars and red hydrogen star forming regions. Recognized as an external stellar system in 1922. Hubble discovered 11 Cepheid variable stars in NGC 6822 in 1925 which made it the first galaxy beyond the Magellanic Clouds to have its distance accurately determined. Above right is the round Bubble nebula in NGC 6822.

Object Label Identifier Notes
Star V17 [K67] V17 Cepheid variable, mV=19.7
Star V21 [K67] V21 Cepheid variable, mV=19.8
Star V5 [H25] V5 Cepheid variable, mV=20.2
Star V6 [H25] V6 Cepheid variable, mV=19.6
Star V7 [H25] V7 Cepheid variable, mV=18.2

Click on the plate solved image to display annotations. 4' across NGC 6822 is about 2,000 light years.