The random motion of a galaxy with respect to the Hubble recessional velocity.
so
The Local Group has a peculiar velocity of 600 ± 27 km s-1 toward galactic coordinates
and 
.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
so
(8)
The Local Group has a peculiar velocity of 600 ± 27 km s-1 toward galactic coordinates
and . 
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