CREATE TABLE table_name_13 (baltimore_group VARCHAR(255), family VARCHAR(255), replication_site VARCHAR(255), virion_shape VARCHAR(255), envelopment VARCHAR(255))
Which Baltimore group has a viron shape of icosahedral, replicates in the cytoplasm, is non-enveloped, and is from the astroviridae family?
    
SQL: SELECT baltimore_group FROM table_name_13 WHERE virion_shape = "icosahedral" AND envelopment = "non-enveloped" AND replication_site = "cytoplasm" AND family = "astroviridae"