Alternate Names

Markanian 40

Type

Supermassive

Location

in the constellation Ursa Major

Distance

300 million light-years (92 megaparsecs)

Mass

6.5 million to 20 million times the mass of the Sun

Size

Diameter roughly 30 to 100 times the size of the Sun

Discovery Methods

• Measuring the motions of gas
• Measuring the motions of stars

A ground-based view of Arp 151. The galaxy is the bright diagonal line below the bright star. [Faulkes Telescope North/Las Cumbres Observatory Global Telescope Network]

This document was last modified: May 11, 2012.