II Zwicky 28

II Zwicky 28 is an interacting ring galaxy at a distance of approximately 390 million light-years.

The sparkling pink and purple loop in Zw II 28 is not a typical ring galaxy because it does not seem to have the usual visible central companion.

[2] For many years it was thought to be a lone circle on the sky, but observations using the Hubble Space Telescope have shown that there may be a possible companion lurking just inside the ring, where the loop appears to double back on itself.

It displays strong Balmer absorption lines interior to the ring, and it is possible that a major burst of star formation has recently occurred, using up a large fraction of the galaxy's molecular reservoir, and depleting its dust content.

[3] The bright foreground star is not associated to Zwicky; it is in our own galaxy, about 1,585 light-years away from the sun.