NGC 6822 Barnard's Galaxy

NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. Part of the Local Group of galaxies, it was discovered by E. E. Barnard in 1884. It is one of the closer galaxies to the Milky Way. It is similar in structure and composition to the Small Magellanic Cloud. It is about 7,000 light-years in diameter.The galaxy contains regions of rich star formation and curious nebulae, such as the bubble visible in this image. Astronomers classify NGC 6822 as an irregular dwarf galaxy because of its odd shape and relatively diminutive size by galactic standards. The strange shapes of these cosmic misfits help researchers understand how galaxies interact, evolve and occasionally "cannibalise" each other, leaving behind radiant, star-filled scraps.

At only about a tenth of the Milky Way's size, Barnard’s Galaxy fits contains about 10 million stars — a far cry from the Milky Way’s estimated 400 billion.

Ο NGC 6822 ή Γαλαξίας του Μπάρναρντ, είναι ακανόνιστος γαλαξίας που βρίσκεται περίπου 1,6 εκατομμύριο έτη φωτός μακριά, στον αστερισμό Τοξότη. Είναι μέλος της Τοπικής ομάδας γαλαξιών και ανακαλύφθηκε από τον Αμερικανό αστρονόμο E.E. Μπάρναρντ το 1884. Είναι ένας από τους κοντινότερους γαλαξίες, παρόμοιος σε δομή και σύσταση με το Μικρό Νέφος του Μαγγελάνου. Οι διαστάσεις του είναι περίπου 7000 έτη φωτός.

Location: Via Lactea Observatory, Kristallopigi Paramithia, Greece

Instruments and exposure data
Sky-Watcher EQ6 Pro Belt Drive Mod

Imaging:

W.O FLT110 with dedicated TMB field flattener
FeatherTouch 3'' focuser
Starizona MicroTouch autofocuser
SBIG ST10XME CFW9 Filters: Luminance Red Green Blue  (Baader Planetarium)

Lum    :23*8min 39*7min 1*10min -10C bin 1x1 total: 7h 47min

Red     :21*8min -10C bin 1x1 total: 2h 48min

Green:26*6min -10C bin1x1 total: 2h 36min

Blue    :27*5min  -10C bin1x1 total: 2h 15min

Darks 50 Bias 350 Flats 25

Guiding:

W.O ZS80 ED
Meade DSI

Total exposure time:15h 26min  6 nights  Jul 3,8 Aug 2,6,24,27  

A more stretched luminance channel with IFN clearly visible...i suppose