The TW Hydrae association is a group of approximately thirty very young stars located 50 parsec

Parsec

The parsec is a unit of length used in astronomy. It is about 3.26 light-years, or just under 31 trillion kilometres ....

s from Earth that share a common motion and appear to all be roughly the same age, 5-10 million years old. The best studied members of this stellar association
are TW Hydrae

TW Hydrae

TW Hydrae is an orange dwarf star approximately 176 light-years away in the constellation of Hydra . The star is the closest T Tauri star to the Solar System. TW Hydrae is similar in mass to the Sun, but is only about 5-10 million years old...

 (nearest known accreting T Tauri star

T Tauri star

T Tauri stars are a class of variable stars named after their prototype – T Tauri. They are found near molecular clouds and identified by their optical variability and strong chromospheric lines.-Characteristics:...

 to the Earth), HR 4796

HR 4796

HR 4796 is a binary star system approximately 220 light-years away in the constellation of Centaurus. The system includes an A-type main sequence star and a red dwarf star. The primary star is twice as massive as the Sun and twenty times more luminous. It is thought to be approximately 8 million...

 (an A-type star with resolved dusty debris disk; the most massive known group member), HD 98800

HD 98800

HD 98800, also catalogued as TV Crateris , is a quadruple star system approximately 150 light-years away in the constellation of Crater . The system is located within the TW Hydrae association...

 (a quadruple star system with debris disk), and 2M1207

2M1207

2M1207, 2M1207A or 2MASS J12073346-3932539 is a brown dwarf located in the constellation Centaurus; a companion object, 2M1207b, may be the first extrasolar planetary mass companion to be directly imaged, and is the first discovered orbiting a brown dwarf.2M1207 was discovered during the course of...

 (accreting brown dwarf with remarkable planetary-mass companion 2M1207b

2M1207b

2M1207b is a planetary-mass object orbiting the brown dwarf 2M1207, in the constellation Centaurus, approximately 170 light-years from Earth...

).