Planetoid beyond Pluto was discovered (November 14, 2003 in 6:32, San Diego, California), at the moment the most distant celestial body of solar system. It is called Sedna, upon Eskimo’s sea goddess and has long trajectory around Sun. Sedna's influence is interpreted by some astrologers as ultimate state of consciousness outside time/space context, perception of higher dimension and transcendental influence.
Before Sedna, planetoid Quaoar was found (June 4, 2002 in 22:48, Pasadena, California), also beyond Pluto. There is still no symbol for Quaoar, but interpretation already emerged: it got its name after god who created world of native American tribe Tongva, so according to some astrologers, it symbolizes ultimate creative characteristics, and according to others and its position beyond Pluto, it is symbol for transcendent existential states (to approach Quaoar you must pass Pluto, planet of death...). The first discovered planetoid with orbit further than Pluto's was Varuna (November 28, 2000), Ixion was discovered April 3, 2002.
More and more astronomers consider Pluto, Varuna, Ixion, Quaoar and Sedna as planetoids of so called Cuiper's belt and expect discovery of similar planetoids further from Sedna. We live in interesting time of penetration beyond Pluto's borders of solar systems...
Astronomical and astrological web pages on newly discovered planetoids:
http://www.spacetoday.org/SolSys/KuiperBelt/Quaoar.html
http://www.astrologershq.com/asteroids.html
http://www.ashtara.com/html/sedna.html
http://www.astrobarry.com/mar2204.htm
Ephemeris for Quaoar:
http://www.astro.com/swisseph/quaoar.htm
Ephemeris for Sedna:
http://www.astro.com/swisseph/sedna.htm
Ephemeris for Varuna:
http://www.astro.com/swisseph/varuna.htm
Ephemeris for Ixion:
http://www.astro.com/swisseph/ixion.htm