The second IC notes "7300 is not considerably small, but pretty large, extended 150 degrees (John Herschel and Herbert Howe)". Apparent size 2.1 by 1.0 arcmin.

1.0 by 0.5 arcmin

1.8 by 1.1 arcmin

The second IC adds "Bigourdan 452 is 2 seconds to the west of this. I assume it is a very faint double star that I saw in 1875 100 arcsec west southwest, as Bigourdan says his object may be a cluster". Apparent size 1.5 by 1.1 arcmin.

0.7 by 0.6 arcmin

1.7 by 0.7 arcmin

NGC 7307 is listed as a member of a group of galaxies in (or near) Sculptor with recessional velocities of about 1500 to 1800 km/sec (this is not "the" Sculptor Group, a close neighbor to our Local Group, with an average recessional velocity of less than 300 km/sec). About 3.4 by 1.0 arcmin.

The second IC lists a corrected RA (per Howe) of 22 27 05. Apparent size 1.2 by 0.9 arcmin.

2.0 by 1.7 arcmin

The second IC lists a corrected RA (per Howe) of 22 26 57. Apparent size 0.9 by 0.7 arcmin

Based on a recessional velocity of 4535 km/sec, NGC 7311 is about 210 million light years away, in good agreement with redshift-independent distance estimates of 180 to 220 million light years. Given that and its apparent size of 1.6 by 0.8 arcmin, it is about 100 thousand light years across.

1.5 by 0.8 arcmin

0.7 by 0.5 arcmin

NGC 7314 is a Seyfert galaxy (type S1h). Based on a recessional velocity of 1430 km/sec, it is about 65 million light years away, in good agreement with redshift-independent distance estimates of 50 to 70 million light years. Given that and its apparent size of 4.6 by 2.1 arcmin, it is about 90 thousand light years across. NGC 7314 is listed as a member of a group of galaxies in (or near) Sculptor with recessional velocities of about 1500 to 1800 km/sec (this is not "the" Sculptor Group, a close neighbor to our Local Group, with an average recessional velocity of less than 300 km/sec).

1.6 by 1.6 arcmin

1.1 by 0.9 arcmin

NGC 7317 is one of the four galaxies in Stephan's Quintet which are at about the same distance from us and more or less obviously interacting (NGC 7320 is merely a foreground galaxy). Based on its recessional velocity of 6600 km/sec, NGC 7317 is about 310 million light years away. Given that and its apparent size of 0.7 by 0.7 arcmin, it is about 65 thousand light years across.

NGC 7318A and B represent two of the four galaxies in Stephan's Quintet which are at about the same distance from us and more or less obviously interacting (NGC 7320 is merely a foreground galaxy). Based on a recessional velocity of 6630 km/sec, NGC 7318A (the western member of the pair) should be about 310 million light years away, which is about the same distance as NGC 7317. However, there must be a substantial effect due to peculiar (non-Hubble-expansion) velocities, since NGC 7318B, which is strongly interacting with NGC 7318A and must be at the same distance, has a recessional velocity of only 5775 km/sec, which corresponds to a distance of only 270 million light years. That value is probably too low, and the other distance may be too high; so the pair must have an actual distance around 290 million light years, give or take at least 10 million light years. Given that, NGC 7318A's apparent size of 1.3 by 1.2 arcmin corresponds to about 110 thousand light years, and NGC 7318B's apparent size of 2.0 by 1.0 arcmin corresponds to about 170 thousand light years (these sizes appear to include the clouds of gas and stars ejected from the main structures by their gravitational interaction). Note: In the images below, NGC 7318A is the galaxy to the west (or right, since north is at the top), and 7318B is the one to the east (or left).

Below, an infrared view of the region shows (in false-color green) a region of gas larger than our Milky Way galaxy colliding with the esatern side of NGC 7318B at more than a million miles an hour. The shock wave caused by that collision heats up the gas (causing the radiation shown in the image) and compresses it, forming knots of hot, bright young stars seen scattered throughout the region in the visible-light images above. (Infrared Image Credits: NASA/JPL-Caltech/Max-Planck Institute/P. Appleton (Spitzer Science Center / Caltech), Spitzer Space Telescope)

NGC 7319 is one of the four galaxies in Stephan's Quintet which are at about the same distance from us and more or less obviously interacting (NGC 7320 is merely a foreground galaxy). Based on a recessional velocity of 6745 km/sec, NGC 7319 is about 300 million light years away, which is about the same as the estimated distances for the other members of the group. Given that and its apparent size of 1.7 by 1.3 arcmin, it about 150 thousand light years across, and a long arm of ejected material extends another 200 thousand light years or so to its southwest. Presumably due to its gravitational interaction with the other members of the Quintet, NGC 7319 is a Seyfert galaxy (type Sy2).

Although listed as a member of Stephan's Quintet (because discovered by Stephan at the same time, and in the same direction), NGC 7320 is unconnected to the other galaxies in the group, being nearly ten times closer to us. Based on a recessional velocity of 785 km/sec, NGC 7320 is about 35 million light years away. However, for such small distances, peculiar (non-Hubble-expansion) velocities can significantly affect the distance estimate, and the value is considerably less than redshift-independent estimates of 45 to 60 million light years; so for the purposes of this discussion, I have assumed an approximate distance of about 50 million light years. Given that and its apparent size of 2.2 by 1.1 arcmin, the galaxy is probably about 30 thousand light years across.

"NGC 7320A" has no apparent relationship to NGC 7320, so save for being within a quarter degree of Stephan's Quintet, it is a bit of a mystery why it has received its faux NGC name. Other than its apparent size (about 0.75 by 0.2 arcmin), there appears to be nothing available.

PGC 69346 is not an NGC object, but is commonly listed as NGC 7320B, perhaps because it is closer to the main components of Stephan's Quintet than NGC 7320, which is merely a foreground galaxy. Based on a recessional velocity of 6380 km/sec, it is about 300 million light years away. Given that and its apparent size of 0.85 by 0.25 arcmin, it is about 75 thousand light years across.

PGC 69279 is not an NGC object, but is commonly listed as NGC 7320C, and unlike "NGC 7320A" and "NGC 7320B", is at least somewhere near its namesake. Based on a recessional velocity of 5985 km/sec, PGC 69279 is about 280 million light years away, which is close to the average distance of Stephen's Quintet, so unlike NGC 7320, which is a foreground galaxy, NGC 7320C may be a member of the group. Given that distance and its apparent size of 0.7 by 0.6 arcmin, it is about 55 thousand light years across.

1.6 by 1.1 arcmin

0.9 by 0.6 arcmin

1.4 by 1.1 arcmin

1.0 by 0.8 arcmin

2.0 by 0.7 arcmin

3.7 by 2.7 arcmin

1.4 by 1.4 arcmin

10.2 by 4.2 arcmin apparent size. Note: Although some images of NGC 7331 are shown below, several others will be posted when a discussion of the galaxy's physical characteristics is added to this entry (in the next iteration of this page).

4.1 by 1.1 arcmin

1.2 by 0.6 arcmin

0.8 by 0.4 arcmin

1.0 by 0.8 arcmin

2.8 by 0.7 arcmin

0.9 by 0.6

The first IC lists a corrected RA (per Ormond Stone) of 22 31 27. Apparent size 2.4 by 1.0 arcmin.

1.3 by 1.3 arcmin

1.0 by 0.8 arcmin

1.5 by 0.8 arcmin

1.2 by 0.2 arcmin

0.4 by 0.3 arcmin

1.5 by 0.3 arcmin

1.1 by 0.6 arcmin

Based on a recessional velocity of 4480 km/sec, NGC 7349 is about 210 million light years away, about 35 million light years beyond redshift-independent distance estimates of about 175 million light years. Presuming an intermediate distance of about 200 million light years, its apparent size of 1.0 by 0.5 arcmin corresponds to about 60 thousand light years.