In 1784 William Herschel discovered this 3,8′ × 3,2′ sized and 11mag. bright galaxy in the constellation of Sextans.It is classified as an active SA(s)cd-typed galaxy with many starburst regions in the center.
NGC3423 has a real distance of 39mio.light-years from our own milky-way and its diameter measures about 45.000 light-years.
position (epoch 2000):
Ra.: 10h 51m 14,33s
Decl.: +05° 50′ 24,10″
LRGB image from
L = 21x1200s
RGB = 7x1200s each
a total of 14.0hours
80cm f/7 AstroOptik Keller corrected cassegrain
FLI Proline 16803 Astrodon LRGB Gen-II filters Prompt 7
CTIO/UNC Chile,remote controlled
image processing: Bernd Flach-Wilken
here you see NGC3423 in a squared 18.5arcmin.wide FOV.North is up.
for full resolution click HERE
this picture shows NGC2413 in a somewhat larger magnification: