Space · launch vehicle

Proton / UR-500 K/D

RFSA RETIRED

At a glance

Launches

Success rate

61.5%

24 ok · 15 failed

Payload to LEO

—

Payload to GTO

—

Manufacturer

Status

Retired

First flight

10 Mar 1967

Reusable

Height

57 m

Diameter

4 m

Launch mass

696 t

Liftoff thrust

8,847 kN

Stages

Launch cost

—

Booster landings

—

Links

About

This four stage version of the Proton was originally designed to send manned circumlunar spacecraft into translunar trajectory.

Source The Space Devs — Launch Library 2 Last checked 29 Sept 2026