GW190828_065509
Gravitational-wave source · GWTC-2.1-confident
A black hole of about 33 solar masses, formed on 2019-08-28 when two black holes of roughly 24 and 10 solar masses spiralled together 5.0 billion light-years away. LIGO and Virgo felt the collision as ripples in spacetime.
Computed render33.0 ☉
mass (the Sun = 1)
97 km
event-horizon radius (computed)
5.0 billion ly
from Earth
24+10 ☉
the two that merged
The two black holes that merged were about 24 (17–31) and 10 (8–14) solar masses. The remnant is 33 (29–38) solar masses. Values in parentheses are the 90% credible ranges from LIGO, Virgo and KAGRA (GWTC).
Its event horizon, the edge past which nothing returns, spans about 97 km in radius. The waves we detected had been travelling for 5.0 billion years before they reached us.
Black holes of similar mass
GW240428_225440Gravitational-wave source33.0 ☉GW240531_040326Gravitational-wave source32.3 ☉GW231014_040532Gravitational-wave source33.8 ☉GW191219_163120Gravitational-wave source32.2 ☉GW200225_060421Gravitational-wave source32.1 ☉GW191113_071753Gravitational-wave source34.0 ☉
Source: Gravitational-Wave Open Science Center (GWTC-2.1-confident), LIGO Virgo KAGRA. CC BY 4.0. See data & analysis for full sourcing.