NGC 5784 is a lenticular galaxy in the constellation of Boötes. Its velocity with respect to the cosmic microwave background is 5493 ± 18 km/s, which corresponds to a Hubble distance of 81.01 ± 5.68 Mpc (~264 million light-years).[1] It was discovered by German-British astronomer William Herschel on 9 April 1787.[2]
Supernovae
Two supernovae have been observed in NGC 5784:
- SN 2018mef (type Ia, mag. 17.52) was discovered by the Zwicky Transient Facility on 7 June 2018.[3]
- SN 2023bch (type Ia, mag. 15.4) was discovered by ASAS-SN on 30 January 2023.[4]
NGC 5739 Group
According to Abraham Mahtessian, NGC 5784 is part of the seven member NGC 5739 group (also known as [M98j] 234). The other six galaxies are: NGC 5598, NGC 5603, NGC 5696, NGC 5739, NGC 5787, and NGC 5860.[5]
See also
References
- ^ a b c d e f g h i j k "Results for object NGC 5784". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 8 August 2024.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC 5784". Celestial Atlas. Retrieved 16 December 2024.
- ^ "SN 2018mef". Transient Name Server. IAU. Retrieved 16 December 2024.
- ^ "SN 2023bch". Transient Name Server. IAU. Retrieved 16 December 2024.
- ^ Mahtessian, A. P. (1998). "Groups of galaxies. III. Some empirical characteristics". Astrophysics. 41 (3): 308–321. doi:10.1007/BF03036100.
External links
Media related to NGC 5784 at Wikimedia Commons- NGC 5784 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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