PARIS — Russia, the United States and China took remarkably similar amounts of time — between 11.5 and 13.6 years — from their first launches of animals to when their astronauts first docked with habitable unmanned modules, according to the Secure World Foundation (SWF).

In a Sept. 5 publication, the Broomfield, Colo.-based organization said it performed the analysis following a widely held misimpression that China, the latest to have performed the feat — the Shenzhou 9 mission in June of this year — has moved much faster than Russia and the United States in manned space.

SWF acknowledged that there are lots of ways of measuring progress in manned space programs, and that the three nations did not follow the same routes to being able to prove their ability to send astronauts to space station modules.

But using this particular metric, despite the nearly half-century between the Russian and U.S. efforts and that of the Chinese, the three nations’ accomplishments appear to be not so different.

Russia’s Sputnik 2, which carried a dog named Laika, was launched in November 1957 and its Soyuz 11 docked with the Salyut 1 habitable module in June 1971 — a span of 13.6 years.

The U.S. Mercury-Atlas 5 mission — carrying Enos the chimpanzee — was in November 1961, with the Skylab 2 rendezvous in May 1973, 11.5 years later.

China’s Shenzhou 2 mission — carrying a monkey, a dog and a rabbit — was in January 2001, with the Shenzhou 9 docking some 12.7 years afterward.

Peter B. de Selding was the Paris bureau chief for SpaceNews.