Const
The systems that are undefined inside the polar circle, |latitude| ≥ 90° − ε, where part of the ecliptic never rises or sets: Placidus and Koch both divide a semi-arc that no longer exists there.
The systems that are undefined inside the polar circle, |latitude| ≥ 90° − ε, where part of the ecliptic never rises or sets: Placidus and Koch both divide a semi-arc that no longer exists there.