NGC 7212

NGC 7212
NGC 7212 image by SDSS
Observation data (J2000 epoch)
Constellation	Pegasus
Right ascension	22h 07m 02.0808s [1]
Declination	+10° 14′ 03.154″ [1]
Distance	369 Mly
Other designations
NGC 7212, CGCG 428-032, CGCG 2204.6+1000, MCG +02-56-011, IRAS 22045+0959 [1]

NGC 7212 is a triplet of galaxies located in the constellation Pegasus. They are also interacting. It is about 117 million light-years from Earth. It was discovered on October 2, 1886, by the astronomer Lewis A. Swift. ^{[2] [1]}

Galaxy Triplet

NGC 7212 imaged by Hubble Space Telescope

NGC 7212 is part of a triplet of galaxies, at the center of which it lies. The galaxy to the northeast is PGC 6728403. The second, located to the southwest, is 2MASS J22070015+1013286. The first two galaxies show clear signs of gravitational interaction . As for the third, further south, its distance from Hubble remains unknown, and it may well be a background galaxy ^[3]

Supermassive black hole

A study conducted in 2007 with 90 Seyfert 2-type galaxies using velocity dispersion allowed scientists to estimate the mass of their central supermassive black holes. For NGC 7212, the mass of the black hole is equal to 30 × 10⁶ M_☉. ^[4]

According to an article published in 2012, Several studies of velocity dispersion in the central region have allowed its mass to be estimated at 3.2 × 10⁷ M_☉. ^[5]

References

1. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2026-01-25.
2. "NGC Objects: NGC 7200 - 7249" . Retrieved 26 December 2025.
3. "NGC 7212 - Galaxy Triplet in Pegasus" . Retrieved 26 December 2025.
4. Bian, W.; Gu, Q. (March 2007). "The Eddington Ratios in Seyfert 2 Galaxies with and without Hidden Broad‐Line Regions". The Astrophysical Journal. 657 (1): 159–166. doi:10.1086/510708. ISSN   0004-637X.
5. Marinucci, Andrea; Bianchi, Stefano; Nicastro, Fabrizio; Matt, Giorgio; Goulding, Andy D. (2012-04-01). "The Link Between the Hidden Broad Line Region and the Accretion Rate in Seyfert 2 Galaxies". The Astrophysical Journal. 748 (2): 130. doi:10.1088/0004-637X/748/2/130. ISSN   0004-637X.