Page "Luna 19" Paragraph 4

Soon afterward, the spacecraft began its main imaging mission — providing panoramic images of the mountainous region of the Moon between 30 ° and 60 ° south latitude and between 20 ° and 80 ° east longitude.

Other scientific experiments included extensive studies on the shape and strength of the lunar gravitational field and the locations of the mascons.

Occultation experiments in May and June 1972 allowed scientists to determine the concentration of charged particles at an altitude of 10 kilometers.

Additional studies of the solar wind were evidently coordinated with those performed by the Mars 2 and 3 orbiters and Veneras 7 and 8.

Communications with Luna 19 were terminated some time between 3 and 20 October 1972, after a year of operation and more than 4, 000 orbits around the Moon.