Luna E-8-5 No.402, also known as Luna Ye-8-5 No.402, and sometimes identified by NASA as Luna 1969C, was a Soviet spacecraft under Luna programme which was lost in a launch failure in 1969. It was a 5,600-kilogram (12,300 lb) Luna E-8-5 spacecraft, the first of at least eleven to be launched. It was intended to perform a soft landing on the Moon, collect a sample of lunar soil, and return it to the Earth. It was, along with Luna 15, one of two unsuccessful missions which had been launched by the Soviet Union in a last-ditch attempt to upstage the Apollo 11 landing under Moon race.

Wikipedia: https://en.wikipedia.org/wiki/Luna_1969C. Original timeline Wikipedia link: https://en.wikipedia.org/wiki/Luna_program. Related NASA reference: https://nssdc.gsfc.nasa.gov/planetary/tent_launch.html#luna1969c. Description adapted from Wikipedia contributors (CC BY-SA 4.0; https://creativecommons.org/licenses/by-sa/4.0/).