Arp 299


Arp 299 is a pair of colliding galaxies approximately 134 million light-years away in the constellation Ursa Major. Both of the galaxies involved in the collision are barred irregular galaxies. NGC 3690 was discovered by German-British astronomer William Herschel on 18 March 1790.
It is not completely clear which object is historically called IC 694. According to some sources, the small appendage more than an arcminute northwest of the main pair is actually IC 694, not the primary companion.
The interaction of the two galaxies in Arp 299 produced young powerful starburst regions similar to those seen in II Zw 96.

Supernovae

Since 1992, fifteen supernovae have been detected in Arp 299:
HostSupernovaTypeMagnitude
NGC 3690SN 1992buunknown16.6
NGC 3690SN 1993GType II16.6
NGC 3690SN 1998TType Ib15.4
NGC 3690SN 1999DType II15.6
NGC 3690SN 2018lrdType Ib17.1
NGC 3690AT 2018melUnknown16.5
NGC 3690SN 2019lqoType II18.3
NGC 3690SN 2020fkbType Ib17.8
NGC 3690SN 2022gnpType Ib17.7
NGC 3690SN 2023wrkType Ia18.1
NGC 3690SN 2024gzkType IIb17.8
NGC 3690SN 2024agfqtypeIIn19.05
IC 694SN 2005UType II16.2
IC 694SN 2010OType Ib15.6
IC 694SN 2010PType Ib/IIb18.3