NGC 3610, NGC 3613, NGC 3619 & NGC 3642

MouseOver for object identification, Click on image for a zoomable version (75% resolution)

Inverted version:

Location / Date

Zellerndorf, March/April 2020

Telescope / Mount / Guiding

ASA 10" Astrograph, ASA 3" Wynne-Corrector (focal length 910mm)
ASA DDM60, no guiding

Camera / Exposure

Moravian G3-16200, Astrodon filters

Lum 74 x 10min, R 24 x 5min bin2x2, G 24 x 5min bin2x2, B 27 x 5min bin2x2

Total exposure time: 18h 35min


PixInsight, Fitswork, Photoshop


NGC 3642 is a spiral galaxy with an active galaxy core in constellation Ursa Major, about 75 Million light years away from our Milky Way. The galaxie belongs to the NGC 3642 group (also known as NGC 3610 group), a galaxy group that also includes the elliptical galaxies NGC 3610 and the lenticular galaxy NGC 3619.
The elliptical galaxy NGC 3613 and the barred spiral galaxy NGC 3625 are part of the NGC 3613 galaxy group. These two galaxy groups are considered associated.

Some of the galaxies, especially NGC 3619, seem to have one ore more tidal streams.

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