What are the love asteroids?

What is the meaning of the love asteroids, pertaining to them in these following signs...
Eros/Apollo in Virgo
Hermes in Sagittarius
Casanova in Cancer
Ceres in Pisces
Sappho/Cupido in Taurus
Aphrodite/Athena in Capricorn
Achilles/Valentine in Aries
Adonis/Lilith/Psyche in Libra