I had observed NGC 3690 (Arp 299)in June!
I watch with 16" f 4,5.
It`s a very interesting Object. The Galaxy ist 130 Mio LJ away, in the constellation Ursa Mayor.
The Galaxy is a pair of colliding galaxies. They involved in the collision. NGC 3690 B in the south and is the small one. IC 694 is in north of NGC 3690 A/B. I don`t have see IC 694! 300px-Hubble_Interacting_Galaxy_NGC_3690_(2008-04-24).jpg
The Hubble Foto n3690.jpg
NGC 3690 (NGC project)
Visuale Magnitude: 11m6
Surface Brightness:12m7
My sketch from June 2013 NGC 3690_neg_700p.jpg
There seems to be some ambiguity about this Arp when it comes to the designation of IC694! SIMBAD and NED agree on IC694 being the tiny round galaxy to the NW of NGC3690. Other sources, including Hyperleda point to the SW of the two colliding galaxies and designate the detached tiny one as MCG+10-17-002A (PGC35325). I'm tempted to go with NED, and I'm sure the expertise on this forum will take away any confusion.
Anyway, I observed it on 4 May 2011 using a 12" SCT + 17mm Nagler. At the time of the observation my assumption was that IC694 was the SW merging galaxy:
NGC3690 and IC694 are visible, MCG+10-17-002A is not: An east to west elongated patch, brighter in an elongated central part, the SW part contains a nucleus (in IC694), the NE part does not (NGC3690). The western part is somewhat elongated from NE to SW, the eastern part is round (evident only when using averted vision).
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