Uranus was discovered in 1871, in Gemini, and rules Aquarius.
Neptune of Pisces, and was discovered nearly in Pisces, in 1846.
Pluto has the co-rulership of Scorpio (and esoteric rulership of Aries), and it was discovered in 1930 in Cancer and has perihelion in Scorpio. Maybe we can ascribed a planet rulership by its perihelion. (By the way Mercury has also perihelion in Gemini)
Currently we miss co-rulership of Taurus, Gemini, Virgo and Libra.
Eris as the co-ruler of Libra
Eris discovered in Aries, may be well the ruler of Libra, since it has perihelion in this sign. Eris has both Pluto and Uranus-like qualities. Uranus is also the esoteric ruler of Libra. Eris is a charged planet, bringing fight for causes, therefore is a mix of fire and air energy. Eris is the sister of Mars. Venus would rule primarly Taurus.
Sedna as the co-ruler of Gemini (or Taurus)
Sedna I think may rule Gemini. It is discovered now in Taurus but will approach perihelion in Gemini, in 2070. Sedna seems to bring geniality, body usage and agression, it could be a co-ruler of Taurus or Gemini. In other studies, I have also noted an idealistic and peaceful quality to Sedna, which could point more towards its rulership of Taurus.
Ceres and asteroids as co-rulers of Virgo
Ceres, now defined as a small planet, may co-rule Virgo. Juno, Pallas and Vesta may also co-rule Virgo, despite the fact that Juno sometimes is ascribed to Taurus. Mercury would rule mainly Gemini.
Chiron as co-ruler of Virgo
Similarly Chiron has perihelion in Virgo-Libra and may rule Virgo.
Quaoar, Orcus, Ixion, Varuna and many other dwarf planets with perihelion in Cetus
Other newly discovered planets could rule Taurus but I think they have too much plutonic-like qualities like Orcus (perihelion in 1895 in Pegasus or tropical Aquarius) and Ixion (perihelion in 2070 in Cetus or tropical Aries). Quaoar will have perihelion in 2070 in Aquarius-Pisces cusp and may well link to a co-rulership of Pisces (or Aquarius?) and its associated native american archetype, and its transformation return to natural law.
Varuna has perihelion in 1930 in Cetus or tropical Pisces and associates well to a Pisces energy.
2003 EL61 will have perihelion in 2133 and 2005 FY9 (now considered dward planet along with Pluto and Eris) in 1879, both curiously also in Cetus!! It's interesting how these two, and Quaoar, Varuna, Ixion and Orcus, all have perihelion around Cetus!
Please see http://astrotransits.blogspot.com/2008/03/astrology-of-new-planets-and-asteroids.html for my previous descruptions of these planets energies
uranus in aries/taurus/gemini (30) revolutions (26) 2010s and 2020s (23) 2012 (18) houses (15) pluto in capricorn/aquarius (14) saturn transits (14) astrology of novel planets (11) uranus transits (11) sideral astrology (8) long-millenia cyles (7) the uranus pluto cycle (7) eris (6) neptune transits (6) pluto transits (6) the saturn pluto cycle (6) ancient history (5) predictions for all decades of 21st century (5) sedna (5) earth changes (4) outer planets and world wars (4) dialogues with planets (3) mars transits (3) neptune in pisces/aries (3) sun transits (3) US history (2) alien disclosure (2) astrological ages (2) jupiter transits (2) mental disorders (2) neptune pluto (2) pluto MC (2) saturn libra (2) technology (2) uranus jupiter (2) uranus neptune (2) T-square transiting your houses (1) esoteric astrology (1) pluto transiting mars (1) pluto transiting mercury (1) pluto transiting sun (1) quaoar (1) saturn return (1) uranus in houses (1)