Juno is one of the larger asteroids, perhaps tenth by size and containing approximately 1.0% the mass of the entire asteroid belt, and is named after the mythological Juno, the highest Roman Goddess. While Venus is typically considered the 'planet of love,' the asteroid Juno seems to function as the asteroid of marriage, and can show us how our feelings toward marriage and the type of partner one is likely to choose or get. Venus and Mars show us the type we want (Venus and the Moon in a man's chart). Sometimes all of this is in sync, sometimes it is not.
Juno symbolizes our capacity for commitment, loyalty or betrayal and sexual intimacy and commitment as well as joint resources. Juno is a patron of relationships and true love and marriage. She has an influence over negative issues such as spousal abuse, powerlessness, and issues of inequality and betrayal.
Juno represents the people we share our lives with, especially in a woman's chart, and points to our karmic partners, who we have a destiny with and how we will relate to them, and they us.
Knowing where Juno is located in your chart can help you discover the type of spouse you will end up with.
When I met my husband Juno had entered my Sun sign and fell close to my Sun. When I married, Juno was sextile my Venus, and described my husband! Juno is definitely a player in the quest for love and marriage.
An asteroid ephemeris will tell you where Juno is located in your chart and what sign it is in. At the time of this post (1-15-2014) transiting Juno is at 6 degrees of Pisces and will move through about half of the signs this year, ending up in Leo by the end of 2014.