M106
M-106 This large and bright galaxy is about 12x5' with a bright oval core and a fainter surrounding halo. At times in good seeing, faint spiral structure can be seen in this galaxy.
Also known as NGC 4258, this system is distinguished by "anomalous arms", better described perhaps as jets, seen curving outward through the disk in radio emission and optical emission lines. Recent measurements of maser regions near the nucleus suggest a supermassive dark object (a black hole candidate with mass of order 100 million solar masses) at the center of this galaxy.