Hey Chiron,
Many astrologers, both professional and amateur, ignore asteroids. They are very small, and little is known about their true influence, as so few case-studies have actually been done. Moreover, many astrologers believe that asteroids with there being so many of them, are sort of pointless specs which can be used (and abused) to explain extremely heavy topics, or, even worse, put off a “real” chart reading altogether! I will agree, though I use asteroids, most issues are better saved for a thoughtful and intense analysis of the planetary bodies such as the planets and the Sun, rather than asteroids. Having the asteroid “karma” in the 6th house will not explain one’s sickness from childhood. The benefit of using planetary bodies to explore issues as opposed to asteroids, is their long-standing history of use, and their widely-received and accepted audience. Asteroids, by contrast are questionable sources, and so their use should be approached with caution.
That shared, I rely on a few methods when it comes to understanding asteroids’ meanings and their influence in a natal chart. In our time here on Earth, and in terms of our spiritual evolvement, generations after generations have turned to the stars for guidance. We have found meaning through the stars, and over time, our collective unconscious (the powerful underlying force which unites us) has bestowed more and more meaning into the stars, rendering the stars powerful conduits of our spiritual awareness. I believe that the social collective unconscious creates meaning through the celestial bodies, and not the other way around. That is to say, the stars compel, they do not impel. I believe that there is always free-will and that we create our own destiny.
You do not, however, need to believe that. I was simply indicating how I came to understand asteroids and am able to provide this forum with an interpretation of their meanings. I simply look at the myth surrounding the names of recognizable asteroids, and drew conclusions as to the myth’s importance in our current society, and then created my interpretation. If the asteroid does not have a myth, or the myth does not seem to pan out in this day and age to have any thematic importance, I ignore it.
Lastly, my interpretations are done with natal charts in mind. These can extend to transits, progressions, and synastry. I would not feel comfortable using asteroids in solar arcs, composites, or horaries (though some may feel differently). I recommend no larger than a 3 degree orb for asteroids when contacting natal planets (and I would ignore minor aspects altogether, though again, some may feel differently), with a 1 degree orb being recommended, especially when dealing with midpoints. Aspects between asteroids are negligible, unless of course, it is connected to more significant aspects, such as Sun conjunct Pallas Athena Trine Pluto conjunct Vesta. Asteroids, moreover, are a like a garnish or a seasoning to the chart; they do stand alone. Therefore, I recommend you treat them as small, sensitive points, which further tell a story about aspects (or lack of aspects) already present in the natal chart. For example, I have no planets in Taurus, nor any planets in the houses ruled by Venus, so when an asteroid showed up there (it was Vesta), I paid some attention to that, wondering what Vesta could tell me in the absence of anything else, or why Vesta in particular, was there.
mod.