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HD 98800
HD 98800, also catalogued as TV Crateris (TV Crt), is a quadruple star system approximately 150 light-years away in the constellation of Crater (the cup). The system is located within the TW Hydrae association. The system consists of "HD 98800 A" and "HD 98800 B" each of which contains two stars.
In 2007, a debris disk was discovered orbiting "HD 98800 B" consisting of two rings which indicates there may be an extrasolar planet orbiting within a distance of 1.5 to 2 astronomical units.
== Stellar system ==
The system consists of four T Tauri stars that are located within the TW Hydrae association. Within the system, there are two separate systems of binary stars. Each system (separately catalogued as "HD 98800 A" and "HD 98800B") consists of two stars. Although the four stars are gravitationally bound, the distance separating the two binary pairs is about 50 astronomical units (somewhat more than the average distance between the Sun and Pluto). Not much is known about each individual star, except that they are basically Solar twin stars.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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