In the first place, there are plenty of astronomers who still think Pluto is a planet; and, in the second place, astrologers are not astronomers, in most cases...
The first chapter in my book, Astrological Repair Manual (which is a free download and which this blog was created for—to get a larger amount of feedback on the book's ideas as I revise and expand it), takes a look at the solar system body called Xena. The astronomers first gave her the designation, 2003 UB313, and she's now called Eris, but the discoverers called her Xena and I'm going to keep calling her that.
Xena travels around the Sun in a 560-year cycle on the outer edge of the Kuiper Belt, a region of space well beyond Pluto that's considered to hold thousands of, dare I say, planets. In the first chapter, I say, (to the reader who I've put in a spacecraft coming back from the depths of space), "You’ve seen some of the Horde—the thousands of other 'planets' that orbit the Sun, so far out that the Sun itself is just another bright star." And further, "With the discovery of Xena (and her moon, Gabrielle), humanity is repeating, on a vaster scale, what it went through around 1781, 1846, and 1930 (the times when Uranus, Neptune, and Pluto were discovered). Each of those discoveries signaled a coming-to-conscious-potential of aspects of the unconscious that humanity had 'earned' the right to use more objectively. Of course, earning the right to use and using are two different things. Xena and her Hordes present the symbol of a HUGE potential for the human race—an entering into the powers of the unconscious like no time in the past—a chance to use energies (multiple and deep ) that have been, so far, little understood." I also say, "Basically, since we know so little about any of the planets beyond Pluto, about all we can hope to do with them in astrology is think of a sheath or aura around us, a non-localized group of potentials and energies that each individual can tap into IF they can manage to begin using the other planetary functions consciously."
Whew! What a mouth-full, or mind-full...
The point of this post is to hint at the concept of groups of bodies (like the ol' asteroid belt) that astrologers have yet to deal with properly...
To take a handful out of thousands of solar system bodies that share similar cycles and try to attribute specific, individual meanings to that mere handful is totally unfair, to the structure of the solar system's cycles and to the minds of the astrologer and their clients.
What are Your thoughts and feelings?