From Starbounder - Starbound Wiki
Ancient Hatch is an object unobtainable by players through normal means. This item's information is present in the game files, but not intended by developers to be in players' possession.
Ancient Hatch is a vertical door type object.
|Apex :||An ancient vertical door.|
|Avian :||An ancient hatch.|
|Floran :||It looksss like a door in the floor.|
|Glitch :||Observant. This hatch is ancient.|
|Human :||A hatch for when going horizontal just isn't enough.|
|Hylotl :||An ancient hatchway, a relic in itself.|
|Novakid :||A hatchway in the floor. It looks plenty old.|