NGC 7320 indicates a small redshift (790 km/s) while the other four exhibit large redshifts (near 6,600 km/s). Since galactic redshift is proportional to distance, NGC 7320 is only a foreground projection[2] and is ~39 million light-years from Earth, making it a possible member of the NGC 7331 group, versus the 210–340 million light-years of the other four.

NGC 7319 has a type 2 Seyfert nucleus.

A sixth galaxy, NGC 7320C, probably belongs to the Hickson association: it has a redshift similar to the Hickson galaxies, and a tidal tail appears to connect it with NGC 7319.

Using its Mid Infrared Instrument (MIRI), the James Webb Space Telescope shows details shrouded by dust in visible light including large shock waves and tidal tails in four of the five galaxies, and previously hidden areas of star formation. These new details will contribute to insights on galaxy evolution.

Image Session Details

General Properties

Coordinates: 22h 35m 57s, +33° 57′ 36″ (J2000)

Apparent Magnitude: ~13

Angular Size: 10.7′ × 3.7′

Distance: ~94 Mpc (~290 Mly) for the main interacting group (NGC 7317, 7318A, 7318B, 7319). 

Constellation: Pegasus

Discovery: Discovered by Édouard Stephan in 1877.

Scientific Databases

Object Type: Compact galaxy group (Hickson Compact Group 92)

Constellation: Pegasus

Apparent Size: 10.7′ × 3.7′

[ OBJECT ]

  Main ID:  NGC 7317

  Type:     Galaxy

[ POSITION ]

  RA:  338.966117°

  Dec: +33.944933°

  Redshift: 0.02226

  Radial velocity: 6599.0 km/s

[ PHOTOMETRY ]

  Catalog: V=13.60, G=18.54, B=14.57

  V: 13.60

  B: 14.57

  B–V: 0.97

  Hubble type (from color): E

  IRAS 12 µm: 0.25 Jy

  IRAS 25 µm: 0.29 Jy

  IRAS 60 µm: 0.64 Jy

  IRAS 100 µm: 3.01 Jy

  1.4 GHz flux: 0.01 Jy

[ DISTANCE ]

  93950000.00 pc (306.42 Mly, NED-D median, nDistance)

[ ALIASES ]

  2MASX J22355187+3356415, LEDA 69256, MCG+06-49-038, NGC 7317

-NED(NGC7317)

-SIMBAD(NGC7317)

Observation Notes

-Telescopius

-Visual Magnitude:13

-Photographic Magnitude:12.9