Luna E-3 No.2, sometimes identified by NASA as Luna 1960B, was a Soviet spacecraft which was lost in a launch failure in 1960. It was a 279-kilogram (615 lb) Luna E-3 spacecraft, the second of two to be launched, both of which were lost in launch failures. It was intended to fly around the moon on a circumlunar trajectory in order to image the surface of the Moon, including the far side. The E-3 spacecraft were similar in design to the E-2A which had been used for the earlier Luna 3 mission, however they carried higher resolution cameras, and were intended to make closer flybys.
Luna E-3 No.2 was launched at 16:07:41 UTC on 16 April 1960, atop a Luna 8K72 carrier rocket, flying from Site 1/5 at the Baikonur Cosmodrome. The Blok-B strap-on booster failed to generate sufficient thrust, and sheered away from the core stage around 0.4 seconds into the flight. This caused the other strap-ons to separate prematurely as well, leaving the rocket with insufficient thrust to achieve orbit. Prior to the release of information about its mission, NASA correctly identified that it had been an attempted circumlunar imagery mission.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.