TW Hydrae association
The TW Hydrae association is a group of very young low-mass stars and substellar objects located approximately 25–75 parsecs from Earth. They share a common motion and appear to all be roughly the same age, 10±3 million years old. It is the youngest such association within 100 pc from Earth.
As of 2017, 42 objects are assigned to the association confidently, and several dozens — uncertainly. Masses of its known members vary from 5 Jupiter masses to 2 solar masses, and their spectral types vary from A0 to L7.
Some of the best studied members of this stellar association are TW Hydrae, HR 4796, HD 98800, and 2M1207.
Included in the association is WISEA 1147, which is a brown dwarf.
