The chart of Arcturus Rising has Jupiter on the Midheaven, and the fixed star Arcturus, at 24Libra17 is close to the Ascendant. The three outer planets are very significant for the art of astrology itself - Uranus representing the analytical side of astrology, Neptune the psychic and intuitive side, and Pluto its psychological and transforming nature. As we can see, all three “astrological” planets are involved in some major aspects:

Uranus is part of a Grand Trine also involving Saturn and the Ascendant, a very useful combination for an astrology group with Saturn providing some stability and structure to the study of astrology.

Neptune is one planet in the Grand Cross together with Jupiter, Juno, and the Sun, which could make for some challenging and robust debates in the group, though Venus, the chart ruler, eases the Jupiter/Neptune opposition by forming easy aspects with both.

Finally, transformative Pluto makes a trine with the Moon - a good metaphor for sharing powerful insights.