Luna E-8-5 No. 405

{{Short description|Soviet space probe (Luna 1970A)}}

{{Infobox spaceflight

| name = E-8-5 No.405

| image = Luna 16.jpg

| image_caption = A Ye-8-5 model in the Museum of Cosmonautics, Moscow.

| mission_type = Lunar lander
Sample return

| operator = Soviet space program

| mission_duration = Failed to orbit

| spacecraft_type = E-8-5

| manufacturer = NPO Lavochkin

| dry_mass =

| launch_mass = {{convert|5600|kg}}

| power =

| launch_date = {{start-date|6 February 1970, 04:16:06|timezone=yes}} UTC

| launch_rocket = Proton-K/D {{nowrap|s/n 247-01}}

| launch_site = Baikonur 81/23

| programme = Luna programme

| previous_mission = Kosmos 305

| next_mission = Luna 16

}}

Luna E-8-5 No.405, also known as Luna Ye-8-5 No.405, and sometimes identified by NASA as Luna 1970A,{{cite web |url=http://nssdc.gsfc.nasa.gov/planetary/tent_launch.html |title=Tentatively Identified Missions and Launch Failures |publisher=NASA NSSDC|first=David R.|last=Williams|accessdate=30 July 2010|date=6 January 2005}} was a Soviet spacecraft which was lost in a launch failure in 1970. It was a {{convert|5600|kg|adj=on}} Luna E-8-5 spacecraft, the fifth of eight to be launched.{{cite web|url=http://www.astronautix.com/craft/lunaye85.htm|archive-url=https://web.archive.org/web/20020225145318/http://www.astronautix.com/craft/lunaye85.htm|url-status=dead|archive-date=February 25, 2002|title=Luna Ye-8-5|last=Wade|first=Mark|publisher=Encyclopedia Astronautica|accessdate=27 July 2010}}{{cite web|url=http://space.skyrocket.de/doc_sdat/luna_e8-5.htm|title=Luna E-8-5|last=Krebs|first=Gunter|publisher=Gunter's Space Page|accessdate=27 July 2010}} It was intended to perform a soft landing on the Moon, collect a sample of lunar soil, and return it to the Earth.