2000 OO67 is a Trans Neptunian Object notable for its highly eccentric orbit. At aphelion it is over 1,000 AU from the sun and, with a perihelion of 21 AU, crosses the orbit of Neptune at closest approach. 2000OO67 is probably composed of rock and ices. A trans-Neptunian object (TNO) is any object in the solar system with all or most of its orbit beyond that of Neptune. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... The astronomical unit (AU or au or a. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... Genitive Neptunian Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ...