Type

Supermassive

Location

In the constellation Coma Berenices

Distance

335 million light-years (103 megaparsecs)

Mass

9.8 billion to 27 billion times the mass of the Sun

Size

Diameter roughly 6 to 17 times the size of the orbit of Neptune

Discovery Methods

• Measuring the motions of stars

The Milky Way's "flickering" black hole -- a StarDate video transcript. [McDonald Observatory/Clark Planetarium Productions]

This document was last modified: May 14, 2007.