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). It was discovered by German-British astronomer William Herschel on 9 April 1787.
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, , , , and .
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. SN 2023bch (Type Ia, mag. 15.4) was discovered by ASAS-SN on 30 January 2023.
See also List of NGC objects (5001–6000)
References
External links