The destination of this cryoship is a barren world, the eleventh planet of a G-class star 5.9 light years from Amarr. They codenamed the system "The Old One". Nothing to do with current-day "Old Man's Star".
Taking into account a bit of slack, let us say 0.1 light years, there are still 15 systems between 5.8 and 6.0 light years from Amarr.
Of these, eight have a G-class star, namely Unkah, Raren, Hutian, Luromooh, Arayar, Gammel, Basan and Ana. Only Gammel in the Bleak Lands has eleven planets, the other candidates have less. So, that must have been their destination. However, the eleventh planet is not barren, but a lava world.
Usually lava worlds are found closer to their star, where the heat from the star in combination with tidal forces sometimes prevents the planet from cooling down. But it is not impossible to have lava worlds as outer planets, especially if there is a gas giant nearby or if the world is heated by a lot of internal radioactivity.
In those early days of astronomy, planets were detected either by tiny dips in the star's brightness as a planet passes in front of it, or by tiny wobbles of the star due to the gravitational pull of the planets - these wobbles are revealed by the Doppler shift in stellar spectral lines. Planets are much fainter than stars, so direct imaging of exoplanets took a while to develop, following breakthroughs in phased array telescopes. But if you can collect even a tiny bit of light from the planet, you can also make an educated guess at what planet type you have.
In general, the number of planets was under-estimated, rather than over-estimated, as small planets in far orbits are much harder to detect than, say, a gas giant in a close orbit. So, I guess it is unlikely that in those days the number of planets around their "The Old One" star was overestimated. It is more likely that they got the type wrong.
This must have been an unwelcome surpise when they woke up at destination...