NGC 4697

NGC 4697 (also known as Caldwell 52) is an elliptical galaxy some 40 to 50 million light-years away in the constellation Virgo. It is a member of the NGC 4697 Group, a group of galaxies also containing NGC 4731 and several generally much smaller galaxies [3] This group is about 55 million light-years away; it is one of the many Virgo II Groups, which form a southern extension of the Virgo Supercluster of galaxies.[3]

NGC 4697
NGC 4697 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 48m 35.9s[1]
Declination−05° 48′ 03″[1]
Redshift1241 ± 1 km/s[1]
Distance~ 38 Mly[1] / ~ 50 Mly[2]
Apparent magnitude (V)10.97[1]
Characteristics
TypeE6[1]
Apparent size (V)4.4′ × 2.8′[2]
Other designations
Caldwell 52, UGCA 300, MCG -01-33-010, PGC 043276[1]

The distance to NGC 4697 is not known with high precision: measurements vary from 28 to 76 million light-years.[1] According to the NASA Extra-galactic Database, the average is about 38 million light-years;[1] according to SIMBAD, about 50 million light-years.[2]

The supermassive black hole at the core of NGC 4697 has a mass of 1.3+0.18
−0.17×108 M☉ as measured from Atacama Large Millimeter Array observations of the rotation of the central gas disk.[4]

One supernova has been observed in NGC 4697: SN 2018imd (type Ia, mag. 15.5).[5]

References
  1. "NED results for object NGC 4697". NASA/IPAC Extragalactic Database. Retrieved 2010-11-28.
  2. "NGC 4697". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-11-28.
  3. "The Virgo II Groups". Atlas of the Universe. Retrieved 2010-11-28.
  4. Davis, T. A.; Bureau, M.; Onishi, K.; Cappellari, M.; Iguchi, S.; Sarzi, M. (2017). "WISDOM Project - II. Molecular gas measurement of the supermassive black hole mass in NGC 4697". Monthly Notices of the Royal Astronomical Society. 468 (4): 4675. arXiv:1703.05248. Bibcode:2017MNRAS.468.4675D. doi:10.1093/mnras/stw3217.
  5. Transient Name Server entry for SN 2018imd. Retrieved 23 March 2023.


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