Features:

1. Seyfert's Sextet in constellation Serpens was discovered by Carl Seyfert (1911--1960) in 1951.

2. The image appears to be approximately true color, but it's hard to know with astrophotography since the image makers can make the colors anything they like and often enhance colors to bring out features.

3. Seyfert's Sextet consists of 6 galaxies. Five are gravitationally bound together into a small compact galaxy cluster which is ∼ 58 Mpc away. Actually, two of the bound group seem to be one galaxy that is somewhat broken.

4. The 6th galaxy is a background object at ∼ 269 Mpc and is NOT gravitationally bound bound to the others. It's the face-on spiral (NGC 6027d) whose apparent size is small.

   Since NGC 6027d is ∼ 5 times farther away than the other 5 galaxies, it is NOT surprising that it has apparent size ∼ 1/3 of those others. That the apparent size is NOT ∼ 1/5 of the others must be because it is intrinsically a larger galaxy.

5. The names and types of the galaxies in Hubble sequence galaxy types/De Vaucouleurs system going from the top down are:
   1. NGC 6027c: an SB(s)c? seen edge-on (see also NED: NGC 6027c).

   2. NGC 6027a: an SA pec seen edge-on (see also NED: NGC 6027a).

   3. NGC 6027b: an S0 pec seen sort of edge-on (see also NED: NGC 6027b).

   4. NGC 6027: an S0 pec seen sort of edge-on (see also NED: NGC 6027).

   5. NGC 6027e: S0? seen sort of edge-on (see also NED: NGC 6027e).

   6. NGC 6027d: an S? or Scd D? (see also NED: NGC 6027d, Sinbad: NGC 6027d).

      The "D" in Scd D may mean D galaxy (i.e., diffuse galaxy), but no one's telling.

   Note "pec" stands for peculiar galaxy---but all galaxies are peculiar in one way or another---they are individuals, not identicals.

   Peculiar galaxies are just a bit more peculiar than most.

6. The 5 gravitationally bound galaxies are interacting galaxies.

8. The galaxy interaction for Seyfert's Sextet is clear for the 3 galaxies that have faint bands of stars connecting them and whose galactic disks maybe look a bit distorted.

   There are NO obvious tidal tails in this image.

9. The interacting galaxies of Seyfert's Sextet should continue interacting for hundreds of millions of years and eventually undergo a galaxy merger to become a giant elliptical galaxy (see Wikipedia: Seyfert's Sextet).