Home Quick Queries
Binary Type Definitions
Detached A binary system where both stars are well within their inner Lagrangian surface.

Example System: KP Aql


Semi-detached One of the stars of the binary completely fills its inner Lagrangian surface; also called Algol systems.

Example System: AD Her


Near contact A semi-detached system where the other component is almost in contact with its inner Lagrangian surface.

Example System: V1010 Oph


Contact System where both stars exactly fill their inner Lagrangian surface.

Example System: BX And


Overcontact A binary system where both stars overfill their inner Lagrangian surface.

Example System: AE Phe


Double contact A binary system where both stars are in contact with their inner Lagrangian surface and one or both stars are in asynchronous rotation.

Example System: RZ Sct