海かい王おう星せい外がい天てん体たいMeaningsNoun1. trans-Neptunian object; transneptunian object; TNOKanji used海sea王king星star外outside天heaven体bodyComposed of海かい王おう星せいNeptune (planet)Noun外がいoutside ...; beyond ...; not included in ...Suffix天てん体たいheavenly body; celestial body; astronomical objectNoun