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Summer Triangle Challenge

Arp 217 reworked

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Arp 217, aka ngc 3310, is a galaxy in the constellation of Ursa Major. It has a very active nucleus with a small ring structure which is only 6" x 9" in angular size. This ring is most likely the result of galactic cannibalism, in which ngc 3310 has devoured a smaller galaxy. ( https://ui.adsabs.harvard.edu/abs/1981A%26A....96..271B/abstract )

The galaxy also has a one sided jet emanating from its centre. This jet is possibly caused by a recoiling black hole sending out radiation and matter. Where the jet passes, it triggers violent star formation. ( https://ui.adsabs.harvard.edu/abs/1984MNRAS.207...47B/abstract ) In this image, the jet is the straight but irregular feature going from the centre of the galaxy towards the upper right corner.

Ngc 3310 has several tidal streams, which are just barely visible in this image. (One loop stretches towards the upper left corner, about the same diameter as the central, bright region of the galaxy.)

Technical data:

11.4 hours of integation time in Ha, L, R, G, and B, of which 4 hrs L, and 4 hrs Ha

I collected the data back in 2019.

Telescope: SW MN190

Camera: ZWO ASI174MM-Cool

Processed in PixInsight


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