and IC 694 (which see for more discussion). These are not, as is
often supposed, the two components of the peculiar interacting system, Arp
299. Instead, NGC 3690 refers to these two peculiar galaxies, while IC 694
is the small elliptical or lenticular about an arcmin northwest. Lord Rosse
clearly resolved the two components in at least one of his observations, and
he also noted IC 694 as an "appendage" to the north-west of the pair. Swift
later rediscovered the IC object; this led Dreyer to assign it its own number
in the first IC.
Note, too, that the numbers NGC 3690 and IC 694 are incorrectly assigned to
Arp 296 in the tables in the Arp Atlas. This has further exacerbated the
naming problem, as Arp 296 is another interacting pair just a few arcmin
following Arp 299.