NGC3684 + NGC3686 Galaxies in Leo

Nearly looking like twins,these two Leo-Galaxies really resemble each other.Each is sized about 3,2′ × 2,5´ and shining with  13mag visual brightness.

Their structure is a bit different:NGC3684 is  SA(rs)bc-typed galaxy,NGC3686 a barred spiral of type SB(s)bc.Their real distance is equal: 49 mio light-years away.

Both galaxies have a lot of starburst regions,which emitt a lot of Halpha-light.

Quite different are their discovery-dates;NGC3684 was first seen by John Herschel in 1831,while NGC3686 was discovered 47 years earlier by William Herschel.


position (epoch 2000):


Ra.: 11h 27m 11,2s
Decl.: +17° 01′ 49″


Ra.: 11h 27m 44.0s
Decl.: +17°13′ 27″


image data:

LRGB image with L = 21x1200s, RGB = 6x1200s each,a total of 13.0 hours

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 the two Leo-GXs (the upper one NGC3686,the lower one NGC3684) in a 21.8´ squared FOV.

For full resolution click HERE




Last modified on Wednesday, 15 January 2020 17:55

Go to top