When galaxies misbehave, they don’t do it quietly.
AM 2102-482 in the constellation of Indus (RA 21 06 14.6, Dec −48 10 10) is a compact group where three very different galaxies share the same field. At the top is ESO 235-58, often cataloged as a barred spiral but more likely tied to the polar-ring class. The supposed “bar” is actually an embedded edge-on disk cut through by a dark dust lane, while faint, asymmetric outer material forms a distorted ring or disk around it. It isn’t a classic polar ring with a neat perpendicular structure — more the aftermath of an accretion event where the outer material has been warped and stretched by interactions — but its lopsided arcs still give it that polar-ring-related signature. At about 193 million light years away, ESO 235-58 spans roughly 82,000 by 60,000 light years, with its faint outer ring-like envelope best revealed in deep exposures.
In the middle lies ESO 235-57, a thin edge-on spiral about 229 million light years distant. Its narrow disk is bisected by a sharp dust lane, and a faint halo surrounds it, hinting at tidal disturbance. It measures roughly 88,000 by 46,000 light years.
The brightest member is ESO 235-55, a grand-design spiral around 223 million light years away. Its sweeping arms are filled with bright blue knots of star formation, interlaced with dusty filaments that curl along the spiral pattern. At about 228,000 by 190,000 light years, it dominates the group both in size and presence.
Surrounding all three is a haze of faint tidal debris and asymmetric extensions, the subtle fingerprints of their gravitational encounters. Together they present a portrait of warped rings, razor-thin dust lanes, luminous star-forming arms, and drifting tidal streams — a small group where cosmic order and disorder collide in plain view.
Imaged in LRGB on my Planewave CDK 1000 at Observatorio El Sauce, Chile.
Image acquisition and processing: Mike Selby