The smallest but most determined asteroid goddess is Vesta. To the Greeks, she was Hestia who is actually the woman pictured in the Virgo the Virgin glyph. When the Romans took over the world, they renamed her Vesta and depicted her as the goddess of the hearth and the keeper of the sacred flame. (Remember the Vestal Virgins?) I, like a growing number of astrologers, assign Virgo rulership to Vesta. Poor Virgo doesn't have its own ruling planet...Scorpio finally got Pluto but Virgo and Taurus are so far without rulers. However, Vesta's dedication to a cause despite the hardship it causes her, the organized way she goes about keeping the fires burning - all sound Virgoan to me - and why else would the ancients make Virgo Virgin the picture of Hestia?
Simply, Vesta in a person's horoscope indicates where their burning heart's desire rests -- some inner burning fire...for me it is in the 12th house. Duh -- twelfth house our connection to the universe-- astrologer - hello! Seen in the first house, it would be a dedication to self-goals -often to the exclusion of long-term relations with others. In the fifth house, it will give a dedication to artistic and creative goals. The eleventh house placement would lend a person to be dedicated to group humanitarian efforts -- remember Jane Addams?
Vesta is the little but bright asteroid that keeps our inner passion and inner dedication burning. Someone with a strongly aspected Vesta will give up everything to achieve their goal - family, sex, society--- everything! Now that doesn't happen in too many charts but it gives you some idea of how intense she can be.
Girls will be girls. Don't mess with them when they are set on something!