[vsnet-chat 784] Re: on NGC 3690/IC 694 system

[bas@lowell.Lowell.Edu (Brian Skiff)]

     Harold Corwin, expert historical NGC/IC identification sleuth, offers
these comments at the NGC/IC Project Web site:

IC 694 is the faint galaxy just north-preceding the peculiar interacting pair
NGC 3690.  Swift's discovery note is not very clear about the object's 
location with respect to the NGC object, but his position places it
northwest.  If we assume that he took the NGC position for 3690 and offset 
from that to find his own position and compare the offsets with those from the
modern positions, we find roughly the same numbers.

Swift, however, was not the first to see IC 694.  Lord Rosse's observation of
NGC 3690 in 1860 mentions an ``appendage'' about one object (i.e. NGC 3690)
diameter northwest.  This description fits what he could have seen with his 
Leviathan, so Dreyer correctly credits him as well as Swift with the discovery.

More such discussions, based on original source observations can be found at:

http://vsnet.ngcic.com/hcngcic.htm


\Brian

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