Atlas of Peculiar Galaxies
Spiral galaxies with one heavy arm

Arp Number
Common Name
Notes
25
NGC 2276
-
26
M101
Face-on spiral galaxy with five notable companion galaxies
27
NGC 3631
-
28
NGC 7678
-
29
NGC 6946
-
30
NGC 6365
Interacting pair of galaxies, with one galaxy viewed edge-on

Question: What is the categorization of the M101 and NGC 6365 galaxies?
Answer: The M101 and NGC 6365 are spiral galaxies, an interacting pair of galaxies where one of the two galaxies is viewed edge-on and spiral arm for the other face-on galaxy.