In a document filed Friday in Anchorage Superior Court, Todd Palin, 55, asked to dissolve the marriage, citing an “incompatibility of temperament between the parties such that they find it impossible to live together as husband and wife.”

The divorce filing uses initials rather than full names, but identifies the couple’s marriage date and the birth date of their only child who is a minor, Trig Palin. The filing asks for joint legal custody of the child.

Anchorage attorney Kimberlee Colbo is representing Todd Palin in the divorce. In a filing, Colbo said she would ask the court to designate the divorce confidential as it moves forward.

Colbo did not immediately respond Monday to a request for comment from Todd Palin.