NGC 6822 (Caldwell 57)

Telescope: Planewave 17" CDK reflector, 1940 mm FL
Camera: FLI-PL6303E, 3072 x 2048 pixels
Exposure: Lum: 9 x 3 minutes. Processed with PixInsight.
Image Center (J2000): RA 19h 44m 55s, Dec -14° 48' 09"
Image Size: 22' x 21'

Barred irregular galaxy, part of the Local Group of galaxies. Edwin Hubble identified 11 Cepheids variable in 1925 and determined that NGC 6288 was the first object definitely assigned to a region outside the galactic system. His discovery Cepheid variables in NGC 6822 was one of the most important milestones in galactic astronomy.


NGC 6822 (Caldwell 57), Barred irregular galaxy, part of the Local Group of galaxies. 
Edwin Hubble identified 11 Cepheids variable in 1925 and determined that NGC 6288 was the first object definitely assigned to a region outside the galactic system. His discovery Cepheid variables in NGC 6822 was one of the most important milestones in galactic astronomy.

Object Label Identifier Notes
Star Cluster 4 are marked.
Star Cluster I [H25] I Ionized region
Star Cluster III [H25] III Ionized region, MCG-02-50-003.
Star Cluster IV [H25] IV Ionized region
Star Cluster V [H25] V Ionized region
Star Cluster X [H25] X Ionized region
Star V1 [H25] V1 Cepheid variable, mV=19.00
Star V13 [H25] V13 Cepheid variable
Star V2 [H25] V2 Cepheid variable
Star V7 [H25] V7 Cepheid variable

Click on the plate solved image to display annotations. 5' across NGC 6822 is about 1,700 light years.