14.1
Apparent Mag26,000
Distance (ly)B0-2V
Spectral Type29,000
Temperature (K)S2 is a star orbiting the supermassive black hole Sagittarius A* at the center of the Milky Way. Its orbit provided key evidence for the black hole's existence.
Stellar Data
Apparent Magnitude14.1
Absolute Magnitude-1
Distance26,000 light-years
Spectral TypeB0-2V
Temperature29,000 K
Luminosity20,000 L☉
Radius5 R☉
Mass14 M☉
Right Ascension17h 45m 40.0s
Declination-29° 00′ 28.0″
ConstellationSagittarius
Notable Facts
- S2 orbits Sagittarius A* with a period of 16.05 years
- Its closest approach brings it within 120 AU of the black hole
- S2's orbit helped prove the existence of the Milky Way's central black hole