Here we have an Invincible-class Dreadnaught in action. With a length of 2.011 meters they're nearly twice as long as a Venator-class Star Destroyer and even slightly longer than an Imperial-class. They might be far older than Yoda (they were first built about 3000 years before the Battle of Yavin), slower and more cumbersome than even a Victory I-class Star Destroyer but they're very tough due to strong armor and shields. Invincibles were practically the heaviest thing in the arsenal of the Republic Judicial Forces in the centuries before the Clone Wars which is why it makes sense for several of them being available as starting forces in FotR. They look unusual compared to "classic" Star Wars ships, I call them "flying stove pipes" but they're nonetheless rather useful when you don't have Victorys or Venators.