Kosmos 49 (Russian: Космос 49 meaning Cosmos 49), also known as DS-MG No.2 was a scientific satellite which was launched by the Soviet Union in 1964.

This mission used proton magnetometers to map the Earth's magnetic field and, along with Kosmos 26, represented the USSR's contribution to the International Quiet Solar Year World Magnetic Survey.

A boom 3.3 metres (11 ft) long was attached at one end of the spacecraft to the magnetometers.

[4] It was launched aboard a Kosmos 63S1 rocket[5] from Mayak-2 at Kapustin Yar.

Kosmos 49 was placed into a low Earth orbit with a perigee of 264 kilometres (164 mi), an apogee of 466 kilometres (290 mi), 48.99° of inclination, and an orbital period of 91.8 minutes.