NGC660 and some friends in Pisces. The galaxy at bottom right is PGC6292 aka IC418. At the top is PGC6364.
Polar-ring galaxies are believed to be formed by tidal accretion from a passing galaxy or by a merger. In the case of NGC660 the ring is at a 45 degree angle to the galactic poles and was probably formed by accretion.
Captured at SRO, 12-Dec-2015 to 10-Feb-2016
Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Filters: Astrodon
Image scale: 1.26 arcsec/pixel (drizzled to higher res)
Exposures: 61x600s L, 16x1200s R, 18x1200s G, 15x1200s B (26.5 hours)
Processing: PixInsight 1.8
Acquisition credit: John Kasianowicz, Daniele Malleo, Leonardo Orazi, Rob Pfile, Rick Stevenson and Jerry Yesavage.
Processing credit: Rick Stevenson
High res crop here:
http://www.astrobin.com/full/251388/C/
Full field:
http://www.astrobin.com/full/251388/0/
Cheers,
Rick.