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Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  IC 694  ·  NGC 3690
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Two supernovae in NGC 3690, Walter Leonhard Schramböck
Two supernovae in NGC 3690, Walter Leonhard Schramböck

Two supernovae in NGC 3690

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)
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Two supernovae in NGC 3690, Walter Leonhard Schramböck
Two supernovae in NGC 3690, Walter Leonhard Schramböck

Two supernovae in NGC 3690

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

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Description

Two supernovae are currently visible in NGC 3690!
Although "visible" has to be put into perspective a bit, because the galaxy, which actually consists of two merging galaxies, is only 3.5 arc minutes in size. The newly discovered supernova SN2024gzk is also very close to the bright core area and is not very bright itself, but I tried it and went hunting on the 10-inch newton with the smallest sensor I had at hand. I think that with a little imagination you can see something in there, even if I'm already exceeding the resolution limits of my telescope and only blurry blobs can be seen.
I have to say that I had no experience with this combination of equipment and that the telescope was not collimated well, the guiding was also bad and the individual exposures at 120s were too long.
Maybe I'll try this again with short exposures, but I'm reassured that the astronomers from the neighboring country haven't been able to get any better images with their private equipment.
SN2024gzk is a core collapse supernova (subtype IIb) like 13 other supernovae in this galaxy since 1990. And SN2023wrk (discovered on November 4th, 2023) is still visible. NGC 3690 is currently the galaxy with the most supernovae exploding, with about one per year in recent years (thanks to Manfred Mrotzek from the VdS for these informations).
NGC 3690 is also cataloged as ARP 299.
During such a merger of two galaxies, the gravitational interaction of the gas and dust masses often leads to a phase in which many massive stars and star clusters are formed in a relatively short period of time. And after their short lives, these massive stars then explode as a core collapse supernova, which we are currently witnessing.

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Two supernovae in NGC 3690, Walter Leonhard Schramböck

In these public groups

Astrophotography from home
Deep Sky Northern Hemisphere
Arp's Peculiar Galaxies
Mac Users Group
Austria Astrophotography
Imaged with N.I.N.A.
N.I.N.A. Users
Reflecting Telescope Group
The OSC Club (One Shot Camera)
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