During my Engineering Design seminar today, my teacher mentioned the Kerstan Blunder.
That's the quote directly from his slide.
My question to you is "Did this mission happen?"
I did some research online, and it didn't seem like the U.S. launched a Vigor probe, and it doesn't look like Japan or the USSR did, either.
But what did you find? Was this just a misname? Was there a mission like this, but to a different planet?