播種船シドニア
A fictional massive [[spacecraft]] from the [[Sidonia No Kishi]] science fiction series.

The [b]Sidonia[/b] spaceship is one of several Seed Ships ([i]Hashu-sen[/i]), a series of gigantic "generation ships":https://en.wikipedia.org/wiki/Generation_ship where human people live. It has its own technologically advanced culture and [spoiler]most of its inhabitants are clones and/or genetically modified.[/spoiler] 

Some sections of its outer hull are covered with rocks what gives it an appearance similar to an [[asteroid]] (one of the ends of the ship seems to be embedded into an actual asteroid).
sidonia (ship)