Kakistocrat
SOC-12
In the Wiki pages for Urakkalan (star) and Vland (system), in the “Vland Monostellar System” table, Urakkalan’s mass is given as 1.144 times that of Sol, its (effective) temperature is given as a range, 5700–6400 K, its luminosity is given as 2.126 times that of Sol, and its diameter is given as 0.01096 au [1639593 km]. However, on page 7 of Vilani & Vargr, its mass is given (in item 7) as 1.14 rather than 1.144, and its luminosity is given (in item 20) as 1.21 rather than 2.126. Note that in the upper-right corner of the Urakkalan (star) Wiki page, though, a luminosity of 1.21, a temperature of 6000 K, and a radius of 1.19 times that of Sol [827883 km, thus a diameter of 1655766 km] is given.
Urakkalan is a F8 V star. I looked in the MegaTraveller Consolidated Errata document, but no errata for either the World Builder’s Handbook or Vilani & Vargr was given for any data that are associated with F8 V stars in general or Urakkalan in particular. A typical F8 V star has a mass of 1.18 Solar masses, a radius of 1.221 Solar radii [849450 km, thus a diameter of 1698900 km], a luminosity of 1.95 Solar luminosities, and an effective temperature of 6180 K. (If any two of a star’s radius, luminosity, and effective temperature are known, the third can be calculated.)
In the Wiki page for Vland (world), its orbital period is given as 478.72 standard days, which is the number given in Vilani & Vargr. However, Kepler’s third law puts that orbital period around Urakkalan (presuming that 1.14 Solar masses is its correct mass) at a distance of 1.08623 au from Urakkalan, which is starward of the inner limit of its habitable zone. To put it in the habitable zone, roughly analogously to where Terra is in Sol’s habitable zone, its orbital period would need to be increased by about one-third.
Urakkalan is a F8 V star. I looked in the MegaTraveller Consolidated Errata document, but no errata for either the World Builder’s Handbook or Vilani & Vargr was given for any data that are associated with F8 V stars in general or Urakkalan in particular. A typical F8 V star has a mass of 1.18 Solar masses, a radius of 1.221 Solar radii [849450 km, thus a diameter of 1698900 km], a luminosity of 1.95 Solar luminosities, and an effective temperature of 6180 K. (If any two of a star’s radius, luminosity, and effective temperature are known, the third can be calculated.)
In the Wiki page for Vland (world), its orbital period is given as 478.72 standard days, which is the number given in Vilani & Vargr. However, Kepler’s third law puts that orbital period around Urakkalan (presuming that 1.14 Solar masses is its correct mass) at a distance of 1.08623 au from Urakkalan, which is starward of the inner limit of its habitable zone. To put it in the habitable zone, roughly analogously to where Terra is in Sol’s habitable zone, its orbital period would need to be increased by about one-third.