NGC 753 is a barred spiral galaxy located in the constellation Triangulum. It is notable for its close gravitational interaction with the lenticular galaxy NGC 750, with which it forms a well-studied interacting galaxy pair.
Observation and Discovery NGC 753 was discovered by the British astronomer John Herschel on September 26, 1830. It was subsequently included in the New General Catalogue (NGC) compiled by J. L. E. Dreyer.
Characteristics NGC 753 is classified morphologically as an SBa type galaxy, indicating a barred spiral structure with tightly wound arms and a prominent central bar. The galaxy exhibits a relatively compact nucleus. Its interaction with NGC 750 is believed to be influencing the distribution of its interstellar gas and star formation activity.
- Morphological Type: SBa (barred spiral galaxy)
- Right Ascension (J2000): 01h 57m 23.3s
- Declination (J2000): +30° 49′ 09″
- Distance: Approximately 200–250 million light-years, derived from its redshift and independent distance measurements.
- Redshift (z): Approximately 0.016
- Interaction: NGC 753 is a classic example of an interacting galaxy system, where tidal forces from NGC 750 influence its structure and evolution.
Group Membership NGC 753, along with its companion NGC 750, is part of the Triangulum I Group, a small assembly of galaxies located within the larger Pisces-Perseus Supercluster. This group is characterized by a relatively modest number of member galaxies.
See Also
- NGC 750
- Triangulum (constellation)
- Interacting galaxy