GW 190814 was a gravitational wave (GW) signal observed by the LIGO and Virgo detectors on 14 August 2019 at 21:10:39 UTC,[2] and having a signal-to-noise ratio of 25 in the three-detector network.

[5][6][7][8][9][10] No optical counterpart was discovered despite an extensive search of the probability region.

[11] In June 2020, astronomers reported details of a compact binary merging, in the "mass gap" of cosmic collisions, of a first-ever 2.50–2.67 M☉ "mystery object", either an extremely heavy neutron star (that was theorized not to exist) or a too-light black hole, with a 22.2–24.3 M☉ black hole, that was detected as the gravitational wave GW190814.

[1][12] "We don't know if this object is the heaviest known neutron star or the lightest known black hole, but either way it breaks a record.

[1][13][14][15][16][17] Despite an intensive search, no optical counterpart to the gravitational wave was observed.