Arp 297:

North is left. (mirrored). 13.5x8.5 arcmin (0.35 arcsec/pixel)

Total exposure time:
410 * 30 seconds = 3.4 hours. (across 2 nights)

Exposure used in stack:
329 * 30 seconds = 2.7 hours.

Telescope:
C9.25 (230mm, f/10, fl=2300mm)

Camera:
IMX533 (16mm diagonal, square, color)

Processing:
(no software sharpening used)

1. Callibration (dark + flat)

2. Stacking (average w/ rejection)

3. White balance and background subtraction

4. Asinh stretch

5. Tone curve

6. Crop

Center left: NGC 5754 (z=0.015) and 5752 (z=0.015), a pair of gravitationally interacting spiral galaxies.
Only the spiral pattern of NGC 5752 is visible.
There is a tidal tail extending upwards, but it's too dim to see in this image.

Center right: NGC 5755 (z=0.033), an irregular barred spiral galaxy.

Right: NGC 5753 (z=0.032), a flocculant spiral (not elliptical)

Another pair of interacting galaxies, but at a completely different redshift than Arp 297.
Cool.

There's actually a third member of this group (z=0.032) behind NGC 5752... although it looks like a bright blob in one of the arms:

Top left:
LEDA 2133199 (z=0.014) and LEDA 2132969.
Not much is known about these, and I can't see much either.

Related:

• arp279.fits.fz: Raw stacks.